Intel® Desktop Board
D845GEBV2/D845GERG2
Technical Product Specification
October 2002
Order Number: C14584-001
The Intel® Desktop Board D845GEBV2/D845GERG2 may contain design defects or errors known as errata that may cause the product to deviate from published specifications.
Current characterized errata are documented in the Intel Desktop Board D845GEBV2/D845GERG2 Specification Update.
Revision History
Revision Revision History Date
-001 First release of the Intel® Desktop Board D845GEBV2/D845GERG2
Technical Product Specification.
October 2002
This product specification applies to only standard Intel
®
Desktop Boards D845GEBV2 and
D845GERG2 with BIOS identifier RG84510A.86A.
Changes to this specification will be published in the Intel Desktop Board
D845GEBV2/D845GERG2 Specification Update before being incorporated into a revision of this
document.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS. EXCEPT AS
PROVIDED IN INTEL'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY
WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE
OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR
PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT, OR OTHER INTELLECTUAL
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rights that relate to the presented subject matter. The furnishing of documents and other materials and information does
not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other
intellectual property rights.
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which the failure of the Intel product could create a situation where personal injury or death may occur.
Intel may make changes to specifications, product descriptions, and plans at any time, without notice.
®
The Intel
cause the product to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
Intel Corporation
P.O. Box 5937
Denver, CO 80217-9808
or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777,
Germany 44-0-1793-421-333, other countries 708-296-9333.
Intel, Pentium, Celeron, and LANDesk are registered trademarks of Intel Corporation or its subsidiaries in the United States
and other countries.
†
Other names and brands may be claimed as the property of others.
Copyright 2002, Intel Corporation. All rights reserved.
Desktop Boards D845GEBV2 and D845GERG2 may contain design defects or errors known as errata that may
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
®
power and environmental requirements, and the BIOS for these Intel
D845GEBV2 and D845GERG2. It describes the standard product and available manufacturing
options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Boards
D845GEBV2 and D845GERG2 and their components to the vendors, system integrators, and other
engineers and technicians who need this level of information. It is specifically not intended for
general audiences.
What This Document Contains
Desktop Boards:
Chapter Description
1 A description of the hardware used on the Desktop Boards D845GEBV2 and
D845GERG2
2 A map of the resources of the Desktop Boards
3 The features supported by the BIOS Setup program
4 The contents of the BIOS Setup program’s menus and submenus
5 A description of the BIOS error messages, beep codes, and POST codes
Typographical Conventions
This section contains information about the conventions used in this specification. Not all of these
symbols and abbreviations appear in all specifications of this type.
Notes, Cautions, and Warnings
NOTE
✏
Notes call attention to important information.
INTEGRATOR’S NOTES
#
Integrator’s notes are used to call attention to information that may be useful to system
integrators.
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
WARNING
Warnings indicate conditions, which if not observed, can cause personal injury.
Other Common Notation
# Used after a signal name to identify an active-low signal (such as USBP0#)
(NxnX) When used in the description of a component, N indicates component type, xn are the relative
coordinates of its location on the Desktop Boards D845GEBV2 and D845GERG2, and X is
the instance of the particular part at that general location. For example, J5J1 is a connector,
located at 5J. It is the first connector in the 5J area.
GB Gigabyte (1,073,741,824 bytes)
GB/sec Gigabytes per second
KB Kilobyte (1024 bytes)
Kbit Kilobit (1024 bits)
kbits/sec 1000 bits per second
MB Megabyte (1,048,576 bytes)
MB/sec Megabytes per second
Mbit Megabit (1,048,576 bits)
Mbit/sec Megabits per second
xxh An address or data value ending with a lowercase h indicates a hexadecimal value.
x.x V Volts. Voltages are DC unless otherwise specified.
†
This symbol is used to indicate third-party brands and names that are the property of their
respective owners.
iv
Contents
1 Product Description
1.1 Board Differences.......................................................................................................11
1.2 Overview ....................................................................................................................12
1.2.1 Feature Summary ........................................................................................12
1.2.2 Manufacturing Options .................................................................................13
1.2.3 Board Layouts..............................................................................................14
1.2.4 Block Diagrams ............................................................................................17
1.3 Online Support ...........................................................................................................19
1.4 Operating System Support .........................................................................................19
1.5 Design Specifications .................................................................................................20
1.6 Processor ...................................................................................................................23
1.7 System Memory .........................................................................................................24
1.8 Intel® 845GE Chipset..................................................................................................26
1.8.1 Intel 845GE Graphics Subsystem ................................................................27
1.8.2 USB..............................................................................................................33
1.8.3 IDE Support .................................................................................................34
1.8.4 Real-Time Clock, CMOS SRAM, and Battery...............................................35
1.9 I/O Controller..............................................................................................................35
1.9.1 Serial Port ....................................................................................................35
1.9.2 Parallel Port..................................................................................................35
1.9.3 Diskette Drive Controller ..............................................................................36
1.9.4 Keyboard and Mouse Interface ....................................................................36
1.10 Audio Subsystem........................................................................................................37
1.10.1 Audio Connectors.........................................................................................38
1.10.2 Audio Subsystem Software ..........................................................................38
1.11 LAN Subsystem (Optional) .........................................................................................39
1.11.1 Intel® 82562ET Platform LAN Connect Device.............................................39
1.11.2 Intel® 82540EM Gigabit Ethernet Controller .................................................39
1.11.3 RJ-45 LAN Connector with Integrated LEDs ................................................39
1.11.4 LAN Subsystem Software ............................................................................40
1.12 CNR (Optional)...........................................................................................................40
1.13 Hardware Management Subsystem............................................................................42
1.13.1 Hardware Monitoring ASICs.........................................................................42
1.13.2 Fan Monitoring .............................................................................................44
1.13.3 Chassis Intrusion and Detection...................................................................44
1.14 Power Management ...................................................................................................44
1.14.1 ACPI.............................................................................................................45
1.14.2 Hardware Support ........................................................................................47
2 Technical Reference
2.1 Introduction.................................................................................................................53
2.2 Memory Map ..............................................................................................................53
2.3 Fixed I/O Map.............................................................................................................54
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.4 DMA Channels ...........................................................................................................55
2.5 PCI Configuration Space Map ....................................................................................55
2.6 Interrupts ....................................................................................................................56
2.7 PCI Interrupt Routing Map..........................................................................................57
2.8 Connectors.................................................................................................................59
2.8.1 Back Panel Connectors................................................................................60
2.8.2 Internal I/O Connectors ................................................................................61
2.8.3 External I/O Connectors...............................................................................69
2.9 Jumper Blocks............................................................................................................72
2.9.1 Front Panel Audio Connector/Jumper Block.................................................72
2.9.2 BIOS Setup Configuration Jumper Block......................................................73
2.10 Mechanical Considerations.........................................................................................74
2.10.1 D845GEBV2 Form Factor ............................................................................74
2.10.2 D845GERG2 Form Factor............................................................................75
2.10.3 I/O Shield .....................................................................................................76
2.11 Electrical Considerations ............................................................................................78
2.11.1 Power Consumption.....................................................................................78
2.11.2 Add-in Board Considerations........................................................................78
2.11.3 Standby Current Requirements....................................................................79
2.11.4 Fan Connector Current Capability ................................................................80
2.11.5 Power Supply Considerations ......................................................................81
2.12 Thermal Considerations..............................................................................................81
2.13 Reliability ....................................................................................................................84
2.14 Environmental ............................................................................................................84
2.15 Regulatory Compliance ..............................................................................................85
2.15.1 Safety Regulations.......................................................................................85
2.15.2 EMC Regulations .........................................................................................85
2.15.3 Product Certification Markings (Board Level) ...............................................86
3 Overview of BIOS Features
3.1 Introduction.................................................................................................................87
3.2 BIOS Flash Memory Organization ..............................................................................87
3.3 Resource Configuration..............................................................................................88
3.3.1 PCI Autoconfiguration ..................................................................................88
3.3.2 PCI IDE Support...........................................................................................88
3.4 System Management BIOS (SMBIOS).......................................................................89
3.5 Legacy USB Support ..................................................................................................89
3.6 BIOS Updates ............................................................................................................90
3.6.1 Language Support........................................................................................90
3.6.2 Custom Splash Screen.................................................................................91
3.7 Recovering BIOS Data ...............................................................................................91
3.8 Boot Options...............................................................................................................92
3.8.1 CD-ROM Boot..............................................................................................92
3.8.2 Network Boot................................................................................................92
3.8.3 Booting Without Attached Devices ...............................................................92
3.8.4 Changing the Default Boot Device During POST..........................................92
vi
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot....................................................93
3.9.1 Peripheral Selection and Configuration ........................................................93
3.9.2 Intel Rapid BIOS Boot ..................................................................................93
3.10 BIOS Security Features..............................................................................................94
4 BIOS Setup Program
4.1 Introduction.................................................................................................................95
4.2 Maintenance Menu.....................................................................................................96
4.3 Main Menu..................................................................................................................97
4.4 Advanced Menu..........................................................................................................98
4.4.1 PCI Configuration Submenu.........................................................................99
4.4.2 Boot Configuration Submenu .....................................................................100
4.4.3 Peripheral Configuration Submenu.............................................................101
4.4.4 IDE Configuration Submenu.......................................................................103
4.4.5 Diskette Configuration Submenu................................................................106
4.4.6 Event Log Configuration Submenu.............................................................107
4.4.7 Video Configuration Submenu....................................................................108
4.4.8 USB Configuration Submenu .....................................................................109
4.4.9 Chipset Configuration Submenu.................................................................110
4.4.10 Fan Control Configuration Submenu ..........................................................112
4.5 Security Menu ..........................................................................................................113
4.6 Power Menu .............................................................................................................114
4.6.1 ACPI Submenu ..........................................................................................114
4.7 Boot Menu................................................................................................................115
4.7.1 Boot Device Priority Submenu....................................................................116
4.7.2 Hard Disk Drives Submenu ........................................................................117
4.7.3 Removable Devices Submenu ...................................................................117
4.7.4 ATAPI CD-ROM Drives Submenu..............................................................118
4.8 Exit Menu .................................................................................................................118
Contents
5 Error Messages and Beep Codes
5.1 BIOS Error Messages...............................................................................................119
5.2 Port 80h POST Codes..............................................................................................121
5.3 Bus Initialization Checkpoints ...................................................................................125
5.4 Speaker....................................................................................................................126
5.5 BIOS Beep Codes ....................................................................................................126
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Figures
1. Desktop Board D845GEBV2 Components .................................................................14
2. Desktop Board D845GERG2 Components.................................................................15
3. Desktop Board D845GERG2 Components (with Gigabit Ethernet LAN option) ..........16
4. Block Diagram ............................................................................................................17
5. Block Diagram of the Desktop Board D845GEBV2 with the Gigabit Ethernet
LAN option..................................................................................................................18
6. Intel 845GE Chipset Block Diagram ...........................................................................26
7. USB Port Configuration ..............................................................................................33
8. Audio Subsystem Block Diagram................................................................................37
9. ICH4 and CNR Signal Interface..................................................................................40
10. Thermal Monitoring.....................................................................................................43
11. Location of the Standby Power Indicator LED on the D845GEBV2 Board..................51
12. Back Panel Connectors ..............................................................................................60
13. Audio, Power, and Hardware Control Connectors ......................................................62
14. Audio, Power, and Hardware Control Connectors on the Desktop Board
D845GERG2 with the Gigabit Ethernet LAN option....................................................63
15. D845GEBV2 Add-in Board and Peripheral Interface Connectors ...............................67
16. D845GERG2 Add-in Board and Peripheral Interface Connectors...............................68
17. External I/O Connectors .............................................................................................69
18. Location of the Jumper Blocks....................................................................................72
19. Desktop Board D845GEBV2 Dimensions...................................................................74
20. Desktop Board D845GERG2 Dimensions ..................................................................75
21. I/O Shield Dimensions (for Desktop Boards with the LAN Subsystem).......................76
22. I/O Shield Dimensions (for Desktop Boards with no LAN Subsystem)........................77
23. Localized High Temperature Zones............................................................................82
Tables
1. Summary of Board Differences...................................................................................11
2. Feature Summary.......................................................................................................12
3. Manufacturing Options ...............................................................................................13
4. Specifications .............................................................................................................20
5. Supported Processors ................................................................................................23
6. Supported DDR DIMM Configurations ........................................................................25
7. Supported System Bus Frequency / Memory Speed Combinations............................25
8. Direct Draw Supported Modes....................................................................................28
9. Video BIOS Video Modes Supported for Analog CRTs...............................................29
10. Supported Configuration Modes .................................................................................30
11. Details of bpp Configuration Modes............................................................................31
12. 10/100 Ethernet LAN Connector LED States..............................................................40
13. 10/100/1000 Ethernet LAN Connector LED States.....................................................40
14. Effects of Pressing the Power Switch .........................................................................45
15. Power States and Targeted System Power ................................................................46
16. Wake-up Devices and Events.....................................................................................47
17. Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring ASIC .........................................................................................................48
viii
Contents
18. Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring and Fan Control ASIC...............................................................................49
19. System Memory Map..................................................................................................53
20. I/O Map ......................................................................................................................54
21. DMA Channels ...........................................................................................................55
22. PCI Configuration Space Map ....................................................................................55
23. Interrupts ....................................................................................................................56
24. PCI Interrupt Routing Map..........................................................................................58
25. Front Panel Audio Connector .....................................................................................64
26. Auxiliary Line In Connector.........................................................................................64
27. Rear Chassis Fan Connector .....................................................................................64
28. ATAPI CD-ROM Connector ........................................................................................64
29. ATX12V Power Connector..........................................................................................65
30. Processor Fan Connector...........................................................................................65
31. Main Power Connector...............................................................................................66
32. Chassis Intrusion Connector.......................................................................................66
33. Front Chassis Fan Connector.....................................................................................66
34. SCSI LED Connector..................................................................................................68
35. Front Panel USB Connector .......................................................................................69
36. Front Panel Connector ...............................................................................................70
37. States for a One-Color Power LED.............................................................................71
38. States for a Two-Color Power LED.............................................................................71
39. Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector ........................71
40. Front Panel Audio Connector/Jumper Block...............................................................73
41. BIOS Setup Configuration Jumper Settings................................................................73
42. Power Usage..............................................................................................................78
43. Standby Current Requirements ..................................................................................79
44. Fan Connector Current Capability ..............................................................................80
45. Thermal Considerations for Components ...................................................................83
46. Desktop Board D845GEBV2/D845GERG2 Environmental Specifications ..................84
47. Safety Regulations .....................................................................................................85
48. EMC Regulations........................................................................................................85
49. Boot Device Menu Options.........................................................................................92
50. Supervisor and User Password Functions..................................................................94
51. BIOS Setup Program Menu Bar .................................................................................95
52. BIOS Setup Program Function Keys ..........................................................................96
53. Maintenance Menu.....................................................................................................96
54. Main Menu..................................................................................................................97
55. Advanced Menu..........................................................................................................98
56. PCI Configuration Submenu .......................................................................................99
57. Boot Configuration Submenu....................................................................................100
58. Peripheral Configuration Submenu...........................................................................101
59. IDE Configuration Submenu .....................................................................................103
60. Primary/Secondary IDE Master/Slave Submenus.....................................................104
61. Diskette Configuration Submenu ..............................................................................106
62. Event Log Configuration Submenu...........................................................................107
63. Video Configuration Submenu..................................................................................108
64. USB Configuration Submenu....................................................................................109
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
65. Chipset Configuration Submenu...............................................................................110
66. Fan Control Configuration Submenu ........................................................................112
67. Security Menu ..........................................................................................................113
68. Power Menu .............................................................................................................114
69. ACPI Submenu.........................................................................................................114
70. Boot Menu................................................................................................................115
71. Boot Device Priority Submenu..................................................................................116
72. Hard Disk Drives Submenu ......................................................................................117
73. Removable Devices Submenu..................................................................................117
74. ATAPI CD-ROM Drives Submenu ............................................................................118
75. Exit Menu .................................................................................................................118
76. BIOS Error Messages...............................................................................................119
77. Uncompressed INIT Code Checkpoints....................................................................121
78. Boot Block Recovery Code Checkpoints ..................................................................121
79. Runtime Code Uncompressed in F000 Shadow RAM ..............................................122
80. Bus Initialization Checkpoints ...................................................................................125
81. Upper Nibble High Byte Functions............................................................................125
82. Lower Nibble High Byte Functions............................................................................126
83. Beep Codes..............................................................................................................127
x
1 Product Description
What This Chapter Contains
1.1 Board Differences.......................................................................................................11
1.2 Overview ....................................................................................................................12
1.3 Online Support ...........................................................................................................19
1.4 Operating System Support .........................................................................................19
1.5 Design Specifications .................................................................................................20
1.6 Processor ...................................................................................................................23
1.7 System Memory .........................................................................................................24
1.8 Intel® 845GE Chipset..................................................................................................26
1.9 I/O Controller..............................................................................................................35
1.10 Audio Subsystem........................................................................................................37
1.11 LAN Subsystem (Optional) .........................................................................................39
1.12 CNR (Optional)...........................................................................................................40
1.13 Hardware Management Subsystem............................................................................42
1.14 Power Management ...................................................................................................44
1.1 Board Differences
This TPS describes these Intel® Desktop Boards: D845GEBV2 and D845GERG2. The Desktop
Boards are identical with the exception of the items listed in Table 1.
Table 1. Summary of Board Differences
D845GEBV2
D845GERG2
NOTE
✏
Most of the illustrations in this document show only the Desktop Board D845GEBV2. When there
are significant differences between the two Desktop Boards, illustrations of both boards are
provided.
• ATX Form Factor (12.00 inches by 8.20 inches)
• Six PCI bus connectors
• microATX Form Factor (9.60 inches by 8.20 inches)
• Three PCI bus connectors
11
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.2 Overview
1.2.1 Feature Summary
Table 2 summarizes the major features of the Desktop Boards D845GEBV2 and D845GERG2.
Table 2. Feature Summary
Form Factor
Processor
Memory
Chipset
Video
Audio
I/O Control
USB
Peripheral
Interfaces
D845GEBV2: ATX (12.00 inches by 8.20 inches)
D845GERG2: microATX (9.60 inches by 8.20 inches)
• Support for an Intel
400/533 MHz system bus
• Support for an Intel
400 MHz system bus
• Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for single-sided or double-sided DIMMs (DDR333/266)
• Support for up to 2 GB system memory
NOTE: The Desktop Boards D845GEBV2/D845GERG2 have been designed to
support DIMMs based on 512 Mbit technology for a maximum onboard
capacity of up to 2 GB, but this technology has not been validated (currently
validated up to 1.0 GB) on this board. Please refer to the following Intel
web sites.
For the Desktop Board D845GEBV2:
http://developer.intel.com/design/motherbd/bv2/bv2_mem.htm
For the Desktop Board D845GERG2:
http://developer.intel.com/design/motherbd/rg2/rg2_mem.htm
Intel® 845GE Chipset, consisting of:
®
• Intel
• Intel
• 4 Mbit Firmware Hub (FWH)
• Intel
• AGP connector supporting 1x, 2x, and 4x AGP cards (1.5 V only) or an AGP
• Integrated retention mechanism
Audio subsystem for AC ‘97 processing using the Analog Devices AD1981B codec
SMSC LPC47M172 LPC Bus I/O controller
Support for USB 2.0 devices
• Up to six USB ports
• One serial port
• One parallel port
• Two IDE interfaces with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2
• Three fan connectors
82845GE Graphics and Memory Controller Hub (GMCH)
®
82801DB I/O Controller Hub (ICH4)
®
Extreme Graphics controller
Digital Display (ADD) card
†
keyboard and mouse ports
®
Pentium® 4 processor in an mPGA478 socket with a
®
Celeron® processor in an mPGA478 socket with a
continued
12
Table 2. Feature Summary (continued)
BIOS
Instantly Available
PC Technology
Expansion
Capabilities
• Intel/AMI BIOS (resident in the 4 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PCI, CNR, RS-232, front panel, PS/2 devices, and USB ports
• D845GEBV2: Six PCI bus add-in card connectors (SMBus routed to PCI bus
connector 2)
• D845GERG2: Three PCI bus add-in card connectors (SMBus routed to PCI bus
connector 2)
For information about Refer to
The board’s compliance level with ACPI, Plug and Play, and SMBIOS Section 1.5, page 20
1.2.2 Manufacturing Options
Product Description
Table 3 describes the manufacturing options on the Desktop Boards D845GEBV2 and
D845GERG2. Not every manufacturing option is available in all marketing channels. Please
contact your Intel representative to determine which manufacturing options are available to you.
Table 3. Manufacturing Options
CNR
Hardware Monitor
Subsystem
10/100 LAN
10/100/1000 LAN
One Communication and Networking Riser (CNR) connector (slot shared with
PCI bus connector 6 on the Desktop Board D845GEBV2 and with PCI bus connector
3 on the Desktop Board D845GERG2)
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Three fan sense inputs used to monitor fan activity
• Fan speed control
• Hardware monitoring and fan control ASIC
®
Intel
82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
®
Intel
82540EM 10/100/1000 Gigabit Ethernet Controller (Desktop Board
D845GERG2 only)
For information about Refer to
Available configurations for the Desktop Boards D845GEBV2 and
D845GERG2
Section 1.3, page 19
INTEGRATOR’S NOTE
#
The LAN and the CNR manufacturing options are mutually exclusive.
13
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.2.3 Board Layouts
Figure 1 shows the location of the major components on the Desktop Board D845GEBV2.
DD
CC
BB
AA
W
AB
C
F
D
G
E
H
I
J
Z
K
L
Y
X
QRSTUV P MON
OM13576
A Audio codec P IDE connectors
B Front panel audio connector Q Speaker
C Auxiliary line-in connector R Battery
D Intel 82562ET 10/100 Mbit/sec (PLC) device (Optional) S SCSI LED connector
E Rear chassis fan connector T Chassis intrusion connector
F ATAPI CD-ROM connector U Front chassis fan connector
G Back panel connectors V BIOS Setup configuration jumper block
H +12V power connector (ATX12V) W Auxiliary front panel power LED connector
I mPGA478 processor socket X 4 Mbit Firmware Hub (FWH)
J Processor fan connector Y Front panel connector
K Intel 82845GE Graphics and Memory Controller Hub
(GMCH)
L DIMM sockets AA Front panel USB connector
M I/O Controller BB AGP connector
N Power connector CC PCI bus add-in card connectors
O Diskette drive connector DD CNR connector (optional)
Z Intel 82801DB I/O Controller Hub (ICH4)
Figure 1. Desktop Board D845GEBV2 Components
14
Product Description
Figure 2 shows the location of the major components on the Desktop Board D845GERG2.
A B D
C
F
G
E
H
DD
CC
I
BB
AA
Z
J
K
L
Y
X
W
QRSTUV P MON
OM15021
A Audio codec P IDE connectors
B Front panel audio connector Q Speaker
C Auxiliary line-in connector R Battery
D Intel 82562ET 10/100 Mbit/sec (PLC) device (Optional) S SCSI LED connector
E Rear chassis fan connector T Chassis intrusion connector
F ATAPI CD-ROM connector U Front chassis fan connector
G Back panel connectors V BIOS Setup configuration jumper block
H +12V power connector (ATX12V) W Auxiliary front panel power LED connector
I mPGA478 processor socket X 4 Mbit Firmware Hub (FWH)
J Processor fan connector Y Front panel connector
K Intel 82845GE Graphics and Memory Controller Hub
(GMCH)
L DIMM sockets AA Front panel USB connector
M I/O Controller BB AGP connector
N Power connector CC PCI bus add-in card connectors
O Diskette drive connector DD CNR connector (optional)
Z Intel 82801DB I/O Controller Hub (ICH4)
Figure 2. Desktop Board D845GERG2 Components
15
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Figure 3 shows the location of the major components on the Desktop Board D845GERG2 that
includes the Gigabit Ethernet LAN option. The callouts in Figure 2 and Figure 3 are identical,
except as follows:
• In Figure 3, the auxiliary line in connector (callout “C”) has been moved
• In Figure 3, callout “D” highlights the Intel 82540EM Gigabit Ethernet LAN Controller
A B D
C
F
G
E
H
DD
CC
I
BB
AA
Z
J
K
L
Y
X
W
QRSTUV P MON
OM15117
A Audio codec P IDE connectors
B Front panel audio connector Q Speaker
C Auxiliary line-in connector R Battery
D Intel 82540EM Gigabit Ethernet LAN Controller S SCSI LED connector
E Rear chassis fan connector T Chassis intrusion connector
F ATAPI CD-ROM connector U Front chassis fan connector
G Back panel connectors V BIOS Setup configuration jumper block
H +12V power connector (ATX12V) W Auxiliary front panel power LED connector
I mPGA478 processor socket X 4 Mbit Firmware Hub (FWH)
J Processor fan connector Y Front panel connector
K Intel 82845GE GMCH Z Intel 82801DB I/O Controller Hub (ICH4)
L DIMM sockets AA Front panel USB connector
M I/O Controller BB AGP connector
N Power connector CC PCI bus add-in card connectors
O Diskette drive connector DD CNR connector (optional)
16
Figure 3. Desktop Board D845GERG2 Components (with Gigabit Ethernet LAN option)
Product Description
1.2.4 Block Diagrams
Figure 4 is a block diagram of the major functional areas of the Desktop Boards D845GEBV2 and
D845GERG2. See Figure 7 on page 33 for USB port routing.
Primary/
Secondary IDE
mPGA478
Processor Socket
AGP
Interface
4X AGP
Connector
(1.5 V only)
VGA
Port
= connector or socket
System Bus
(400/533 MHz)
Intel 82845GE
Graphics and
Memory Controller
Hub (GMCH)
Display
Interface
UDMA 33 and
ATA-66/100
Memory Bus
AHA
Bus
USB
LPC Bus
Controller
Intel 82801DB
I/O Controller Hub
(ICH4)
I/O
LPC
Bus
Back Panel/
Front Panel
USB Ports
Serial Ports
Parallel Port
PS/2 Mouse
PS/2 Keyboard
Diskette Drive
Connector
4 Mbit
Firmware Hub
(FWH)
Intel 845GE Chipset
Physical
Layer
Interface
(Optional)
LAN
Connector
(Optional)
DIMM Banks (2)
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
PCI Slot 6
PCI Bus
SMBus
D845GEBV2
Only
SMBus
Hardware
Management
ASIC
Figure 4. Block Diagram
17
CSMA/CD
Unit Interface
AC Link
SMBus
AD1981B
Audio Codec
CNR
Connector
(Optional)
Line In
Line Out
Mic In
Auxiliary Line In
CD-ROM
OM14831
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Figure 5 is a block diagram of the major functional areas of the Desktop Board D845GEBV2 with
the Gigabit Ethernet LAN option. See Figure 7 on page 33 for USB port routing.
Primary/
Secondary IDE
mPGA478
Processor Socket
AGP
Interface
4X AGP
Connector
(1.5 V only)
VGA
Port
= connector or socket
System Bus
(400/533 MHz)
Intel 82845GE
Graphics and
Memory Controller
Hub (GMCH)
Display
Interface
UDMA 33 and
ATA-66/100
Memory Bus
AHA
Bus
USB
LPC Bus
Controller
Intel 82801DB
I/O Controller Hub
(ICH4)
SMBus
I/O
Back Panel/
Front Panel
USB Ports
Serial Ports
Parallel Port
PS/2 Mouse
PS/2 Keyboard
Diskette Drive
Connector
LPC
Bus
4 Mbit
Firmware Hub
(FWH)
Intel 845GE Chipset
Hardware
Management
ASIC
DIMM Banks (2)
PCI Slot 1
PCI Slot 2
PCI Slot 3
LAN
Connector
Intel
82540EM
Gigabit
Ethernet
LAN
Controller
SMBus
PCI Bus
SMBus
PCI Bus
SMBus
CSMA/CD
Unit Interface
AC Link
SMBus
AD1981B
Audio Codec
Line In
Line Out
Mic In
Auxiliary Line In
CD-ROM
Figure 5. Block Diagram of the Desktop Board D845GEBV2 with the
Gigabit Ethernet LAN option
CNR
Connector
(Optional)
OM15119
18
1.3 Online Support
To find information about… Visit this World Wide Web site:
Intel Desktop Boards D845GEBV2 and
D845GERG2 under “Desktop Board
Products” or “Desktop Board Support”
Available configurations for the Desktop
Board D845GEBV2
Available configurations for the Desktop
Board D845GERG2
Processor data sheets http://www.intel.com/design/litcentr
ICH4 addressing http://developer.intel.com/design/chipsets/datashts
Custom splash screens http://intel.com/design/motherbd/gen_indx.htm
Audio software and utilities http://www.intel.com/design/motherbd
LAN software and drivers http://www.intel.com/design/motherbd
http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
http://developer.intel.com/design/motherbd/bv2/bv2_available.htm
http://developer.intel.com/design/motherbd/rg2/rg2_available.htm
1.4 Operating System Support
Product Description
The Desktop Boards D845GEBV2 and D845GERG2 support drivers for all of the onboard
hardware and subsystems under the following operating systems:
†
• Windows
XP
• Windows ME
• Windows 2000
†
• Windows NT
4.0
• Microsoft Windows 98 SE
For information about Refer to
Supported drivers Section 1.3
NOTE
✏
Third party vendors may offer other drivers.
✏ NOTE
USB 2.0 support has been tested with Windows 2000 and Windows XP drivers and is not currently
supported by any other operating system.
19
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.5 Design Specifications
Table 4 lists the specifications applicable to the Desktop Boards D845GEBV2 and D845GERG2.
Table 4. Specifications
Reference
Name
AC ’97 Audio Codec ’97 Revision 2.2,
ACPI Advanced Configuration and
AGP Accelerated Graphics Port
AMI BIOS AMIBIOS Desktop Core 8.0 AMIBIOS 8.0,
ATA/
ATAPI-5
ATX ATX Specification Version 2.03,
ATX12V ATX/ATX12V Power Supply
BIS Boot Integrity Services (BIS)
CNR
Specification
Title
Power Interface
Specification
Interface Specification
Information Technology-AT
Attachment with Packet
Interface - 5 (ATA/ATAPI-5)
Design Guide
Application Programming
Interface (API)
Communication and
Network Riser (CNR)
Specification
Version, Revision Date,
and Ownership
September 2000,
Intel Corporation.
Version 2.0,
July 27, 2000,
Compaq Computer
Corporation,
Intel Corporation,
Microsoft Corporation,
Phoenix Technologies
Limited, and
Toshiba Corporation.
Revision 2.0,
May 4, 1998,
Intel Corporation.
2001,
American Megatrends, Inc.
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
December 1998,
Intel Corporation.
Version 1.2,
August 2000,
Intel Corporation.
Version 1.0,
August 4, 1999,
Intel Corporation.
Revision 1.2,
November 8, 2001,
Intel Corporation.
The information is
available from…
ftp://download.intel.com/ial/
scalableplatforms/
ac97r22.pdf
http://www.acpi.info/spec.htm
http://www.agpforum.org/
specs_specs.htm
http://www.ami.com/support/
doc/amibios8.pdf
http://www.t13.org
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
http://www.intel.com/labs/
manage/wfm/wfmspecs.htm
http://developer.intel.com/
technology/cnr/index.htm
continued
20
Table 4. Specifications (continued)
Reference
Name
DDR
SDRAM
EHCI
EPP IEEE Std 1284.1-1997
El Torito Bootable CD-ROM
Front Panel Front Panel I/O
LPC Low Pin Count Interface
MicroATX microATX Motherboard
PCI PCI Local Bus
PCI Bus Power
Plug and
Play
Specification
Title
Double Data Rate (DDR)
SDRAM Specification
Design Specification for
a 184 Pin DDR
Unbuffered DIMM
®
JEDEC DDR
Intel
200/266 Unbuffered
DIMM Specification
Addendum
Enhanced Host
Controller Interface
Specification for
Universal Serial Bus
(Enhanced Parallel Port)
Format Specification
Connectivity Design
Guide
Specification
Interface Specification
Specification
Management Interface
Specification
Plug and Play BIOS
Specification
Version, Revision Date and
Ownership
Version 1.0,
June 2000,
JEDEC Solid State Technology
Association.
Revision 1.0,
October 2001,
JEDEC Solid State Technology
Association.
Revision 0.9,
September 27, 2001,
Intel Corporation.
Revision 1.0,
March 12, 2002,
Intel Corporation.
Version 1.7,
1997,
Institute of Electrical and
Electronic Engineers.
Version 1.0,
January 25, 1995,
Phoenix Technologies Limited
and International Business
Machines Corporation.
Version 1.0,
October 2000,
Intel Corporation.
Revision 1.0,
September 29, 1997,
Intel Corporation.
Version 1.0,
December 1997,
Intel Corporation.
Revision 2.2,
December 18, 1998,
PCI Special Interest Group.
Revision 1.1,
December 18, 1998,
PCI Special Interest Group.
Version 1.0a,
May 5, 1994,
Compaq Computer Corporation,
Phoenix Technologies Limited,
and Intel Corporation.
Product Description
The information is
available from…
http://www.jedec.org/
http://www.jedec.org/
http://developer.intel.com/
technology/memory/
index.htm
http://developer.intel.com/
technology/usb/download/
ehci-r10.pdf
http://standards.ieee.org/
reading/ieee/std_public/
description/busarch/
1284.1-1997_desc.html
http://www.phoenix.com/
PlatSS/products/specs.html
http://www.formfactors.org/
formfactors/
front_panel_io.htm
http://www.intel.com/
design/chipsets/industry/
lpc.htm
http://www.formfactors.org/
developer/specs/microatx/
microatxspecs.htm
http://www.pcisig.com/
specifications
http://www.pcisig.com/
specifications
http://www.microsoft.com/
hwdev/tech/PnP/
default.asp
continued
21
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 4. Specifications (continued)
Reference
Name
PXE Preboot Execution
SFX SFX/SFX12V Power
SMBIOS System Management
UHCI Universal Host Controller
USB Universal Serial Bus
WfM Wired for Management
Specification
Title
Environment
Supply Design Guide
BIOS
Interface Design Guide
Specification
Baseline
Version, Revision Date
and Ownership
Version 2.1,
September 20, 1999,
Intel Corporation.
Version 2.0,
May 2001,
Intel Corporation.
Version 2.3.1,
March 16, 1999,
American Megatrends
Incorporated,
Award Software International
Incorporated,
Compaq Computer Corporation,
Dell Computer Corporation,
Hewlett-Packard Company,
Intel Corporation,
International Business Machines
Corporation,
Phoenix Technologies Limited,
and SystemSoft Corporation.
Revision 1.1,
March 1996,
Intel Corporation.
Revision 2.0,
April 27, 2000,
Compaq Computer Corporation,
Hewlett-Packard Company,
Lucent Technologies Inc.,
Intel Corporation,
Microsoft Corporation,
NEC Corporation, and
Koninklijke Philips Electronics
N.V.
Version 2.0,
December 18, 1998,
Intel Corporation.
The information is
available from…
ftp://download.intel.com/ial/
wfm/pxespec.pdf
http://www.formfactors.org/
developer/specs/sfx/
sfx12v.pdf
http://www.dmtf.org/
download/standards/
DSP0119.pdf
http://www.usb.org/
developers/docs.html
http://www.usb.org/
developers/docs.html
http://www.intel.com/labs/
manage/wfm/
wfmspecs.htm
22
Product Description
1.6 Processor
NOTE
✏
Refer to Thermal Considerations (Section 2.12, page 81) for important information when using an
Intel Pentium 4 processor operating above 2.80 GHz with this Intel desktop board.
CAUTION
Use only the processors listed below. Use of unsupported processors can damage the board, the
processor, and the power supply. See Intel’s World Wide Web site for the most up-to-date list of
supported processors for these boards.
The board provides an mPGA478 processor socket. Table 5 lists the supported processors. All
supported onboard memory can be cached. See the processor’s data sheet for cachability limits.
Table 5. Supported Processors
Processor Family Designation System Bus Frequency L2 Cache Size
Pentium® 4 processor 2.80, 2.66, 2.53, 2.40B,
and 2.26 GHz
Pentium 4 processor 2.60, 2.50, 2.40, 2.20, 2A,
1.80A, and 1.60A GHz
Pentium 4 processor 2, 1.90, 1.80, 1.70, 1.60,
1.50, and 1.40 GHz
Celeron® processor 1.80, and 1.70 GHz 400 MHz 128 KB
533 MHz 512 KB
400 MHz 512 KB
400 MHz 256 KB
INTEGRATOR’S NOTES
#
• Use only ATX12V-compliant power supplies with the Desktop Board D845GEBV2 and only
ATX12V- or SFX12V-compliant power supplies with the Desktop Board D845GERG2.
ATX12V and SFX12V power supplies have an additional power lead that provides required
supplemental power for the processor. Always connect the 20-pin and 4-pin leads of ATX12V
and SFX12V power supplies to the corresponding connectors on the desktop board, otherwise
the board will not boot. Do not use a standard ATX power supply. The board will not boot
with a standard ATX power supply.
• Refer to Table 7 on page 25 for a list of supported system bus frequency and memory speed
combinations.
For information about Refer to
Processor support Section 1.3, page 19
Power supply connectors Section 2.8.2.2, page 62
23
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.7 System Memory
The Desktop Boards D845GEBV2 and D845GERG2 both have two DIMM sockets and support
the following memory features:
• 2.5 V (only) 184-pin DDR SDRAM DIMMs with gold-plated contacts
• Unbuffered, unregistered single-sided or double-sided DIMMs
• Maximum total system memory: 2 GB; minimum total system memory: 64 MB
• DDR333/266 MHz SDRAM DIMMs only
• Serial Presence Detect (SPD)
• Suspend to RAM
CAUTION
Do not use ECC DIMMs with these Desktop Boards. Using ECC DIMMs could damage the
Desktop Board.
INTEGRATOR’S NOTES
#
• Registered DIMMs are not supported.
• Double-sided x16 DIMMs are not supported.
• Remove the AGP video card before installing or upgrading memory to avoid interference
with the memory retention mechanism.
• These Desktop Boards have been designed to support DIMMs based on 512 Mbit
technology for a maximum onboard capacity of up to 2 GB, but this technology has not
been validated (currently validated up to 1.0 GB) on this board. Please refer to the
following Intel web sites for the latest lists of tested memory:
For the Desktop Board D845GEBV2:
http://developer.intel.com/design/motherbd/bv2/bv2_mem.htm
For the Desktop Board D845GERG2:
http://developer.intel.com/design/motherbd/rg2/rg2_mem.htm
NOTE
✏
To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be
populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows
the BIOS to read the SPD data and program the chipset to accurately configure memory settings
for optimum performance.
For information about Refer to
Obtaining DDR SDRAM specifications Section 1.5, page 20
Obtaining the PC Serial Presence Detect (SPD) Specification Section 1.5, page 20
24
Product Description
Table 6 lists the supported DDR DIMM configurations.
Table 6. Supported DDR DIMM Configurations
DIMM
Capacity
64 MB SS 64 Mbit 8 M x 8/empty 8
64 MB SS 128 Mbit 8 M x 16/empty 4
128 MB DS 64 Mbit 8 M x 8/8 M x 8 16
128 MB SS 128 Mbit 16 M x 8/empty 8
128 MB SS 256 Mbit 16 M x 16/empty 4
256 MB DS 128 Mbit 16 M x 8/16 M x 8 16
256 MB SS 256 Mbit 32 M x 8/empty 8
256 MB SS 512 Mbit 32 M x 16/empty 4
512 MB DS 256 Mbit 32 M x 8/32 M x 8 16
512 MB SS 512 Mbit 64 M x 8 8
1024 MB
(Note 2)
Notes: 1. In this column, “DS” refers to double-sided memory modules (containing DDR SDRAM devices on both sides)
2. DDR333 1 GB (1024 MB) DIMMs have not been validated with these desktop boards.
Configuration
(Note 1)
DS 512 Mbit 64 M x 8/64 M x 8 16
and “SS” refers to single-sided memory modules (containing DDR SDRAM devices on only one side).
DDR SDRAM
Density
DDR SDRAM Organization
Front-side/Back-side
Number of DDR
SDRAM Devices
Table 7 lists the supported system bus frequency / memory speed configurations.
Table 7. Supported System Bus Frequency / Memory Speed Combinations
To use this type of DIMM… The processor’s system bus frequency must be…
DDR333 533 MHz
DDR266 533 MHz or 400 MHz
25
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.8 Intel® 845GE Chipset
The Intel 845GE chipset consists of the following devices:
• Intel 82845GE Graphics and Memory Controller Hub (GMCH) with Accelerated Hub
Architecture (AHA) bus
• Intel 82801DB I/O Controller Hub (ICH4) with AHA bus
• Firmware Hub (FWH)
The GMCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the
Accelerated Hub Architecture interface. The ICH4 is a centralized controller for the board’s I/O
paths. The FWH provides the nonvolatile storage of the BIOS. The component combination
provides the chipset interfaces as shown in Figure 6.
UDMA 33
ATA-66/100
System Bus
Network
USB
845GE Chipset
Display
Interface
82845GE
Graphics and
Memory Controller
Hub (GMCH)
AGP
Interface
SDRAM
AHA
Bus
DDR
Bus
82801DB
I/O Controller Hub
(ICH4)
4 Mbit Firmware
Hub (FWH)
LPC Bus
AC LinkPCI BusSMBus
OM14832
Figure 6. Intel 845GE Chipset Block Diagram
For information about Refer to
The Intel 845GE chipset http://developer.intel.com
Resources used by the chipset Chapter 2
26
Product Description
1.8.1 Intel 845GE Graphics Subsystem
The Intel 845GE chipset contains two separate, mutually exclusive graphics options. Either the
Intel Extreme Graphics controller (contained within the 82845GE GMCH) is used, or an AGP
add-in card can be used. When an AGP add-in card is installed, the Intel Extreme Graphics
controller is disabled.
1.8.1.1 Intel® Extreme Graphics Controller
The Intel Extreme Graphics controller features the following:
• Integrated graphics controller
32 bpp (Bits Per Pixel) graphics engine
266 MHz core frequency
256-bit internal data path for 2-D and 3-D graphics
Motion video acceleration
• 3-D graphics visual and texturing enhancement
• Display
Integrated 24-bit 350 MHz RAMDAC
DDC2B compliant interface
• Video
Dual monitor synchronous display
Hardware motion compensation for software MPEG2 decode
Two multiplexed DVO port interfaces with 165 MHz pixel clocks using an AGP Digital
Display (ADD) card
• Dynamic Video Memory Technology (DVMT) support up to 64 MB
For information about Refer to
DVMT Section 1.8.1.2, page 31
#INTEGRATOR’S NOTE
EMC emission testing of high-speed video was performed on this Desktop Board using scrolling
H’s displayed on the video monitor in accordance with ANSI C63.4-2000 documentation. The
scrolling H’s are displayed using the following font sizes:
• For video resolutions greater than 1600 x 1200 (including 2048 x 1536 and 1920 x 1440),
a font size of 200% is used.
• For a 1600 x 1200 video resolution, a 150% font size is used.
• For resolutions less than 1600 x 1200, a normal or large font size is used.
All available resolutions are tested using the highest available color depth and monitor refresh
rate.
27
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 8 lists the Direct Draw supported modes.
Table 8. Direct Draw Supported Modes
Resolution Color Palette Refresh Frequency (Hz) Notes
320 x 200
256 colors 70
64 K colors 70 3
16 M colors 70 3
320 x 240
256 colors 70
64 K colors 70 3
16 M colors 70 3
352 x 480
256 colors 70
64 K colors 70 3
16 M colors 70 3
352 x 576
256 colors 70
64 K colors 70 3
16 M colors 70 3
400 x 300
256 colors 70
64 K colors 70 3
16 M colors 70 3
512 x 384
256 colors 70
64 K colors 70 3
16 M colors 70 3
640 x 400
256 colors 70
64 K colors 70 3
16 M colors 70 3
Notes: Y = Supported in driver without Direct3D† and OpenGL
3 = Direct3D and OpenGL
Y
Y
Y
Y
Y
Y
Y
†
28
Table 9 lists the video BIOS video modes supported by the graphics subsystem.
Table 9. Video BIOS Video Modes Supported for Analog CRTs
Resolution Color Palette
320 x 200
16 colors 70
256 colors 70
320 x 350
360 x 400
640 x 200
640 x 350
640 x 480
16 colors 70
16 colors 70
16 colors 70
16 colors 70
16 colors 60
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
720 x 400 16 colors 70 T, B
800 x 600
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
1024 x 768
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
1056 x 350 16 colors 70 T, B
1056 x 400 16 colors 70 T, B
1056 x 480 16 colors 70 T, B
1280 x 1024
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
1600 x 1200
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
256 colors 60, 75 G, B, L 1920 x 1440
64 K colors 60, 75 G, B, L
Notes: T = Text mode
G = Graphics mode
B = Banked addressing mode
L = Linear addressing mode
Available Refresh
Frequencies (Hz)
Notes
T, G, B
G, B
T, B
T, B
T, G, B
T, G, B
G, B
Product Description
29
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 10 lists the supported configuration modes of the graphics subsystem.
Table 10. Supported Configuration Modes
Resolution
640 x 480 60, 72, 75, 85, 100, 120 6
800 x 600 60, 72, 75, 85, 100, 120 6
1024 x 768 60, 70, 75, 85, 100 6
1024 x 768 120 5
1152 x 864 60, 75, 85 6
1152 x 864 100 5
1280 x 720 60, 75, 85 6
1280 x 720 100 5
1280 x 768 Reduced blanking 6
1280 x 960 60, 75 6
1280 x 960 85 5
1280 x 1024
1280 x 1024
1280 x 1024
1280 x 1024
1400 x 1050
1600 x 900
1600 x 900
1600 x 900
1600 x 1200
1600 x 1200
1856 x 1392
1920 x 1080
1920 x 1080
1920 x 1200
1920 x 1440
2048 x 1536
Available Refresh
Frequencies (Hz)
60 6
75 5
85, 100 4
120 3
60 6
60 6
75, 85 4
100 3
60 4
75, 85, 100 3
60, 75 3
60 4
75, 85 3
60 3
60, 75 3
60 3
Supported bpp Configuration Mode
(see Table 11 for more information)
30
Product Description
Table 11 describes the bpp configuration mode values referenced in Table 10. In Table 11, assume
that for each configuration mode number, the features of all lower numbers are also supported.
For example, if the supported configuration mode is 4, then modes 1 through 3 are also supported.
DVD consists of both the overlay engine as well as the MPEG decoding; both are necessary for
DVD playback.
Table 11. Details of bpp Configuration Modes
Configuration Mode Number Description
6 32 bpp (16 M colors) with DVD (Overlay + MPEG decode) On
5 16 bpp (64 K colors) with DVD On
4 32 bpp (16 M colors) with DVD Off
3 16 bpp (64 K colors) with DVD Off
2 8 bpp (256 colors) with DVD On
1 8 bpp (256 colors) with DVD off
For information about Refer to
Obtaining graphics software and utilities Section 1.3, page 19
1.8.1.2 Dynamic Video Memory Technology (DVMT)
DVMT enables enhanced graphics and memory performance through Direct AGP, and highly
efficient memory utilization. DVMT ensures the most efficient use of available system memory
(up to 64 MB) for maximum 2-D/3-D graphics performance.
DVMT uses a portion of system physical memory (as set in the BIOS Setup program) for
compatibility with legacy applications. An example of this would be when using VGA graphics
under DOS. Once loaded, the operating system and graphics drivers allocate the buffers needed
for performing graphics functions.
NOTE
✏
The use of DVMT requires operating system driver support.
For information about Refer to
Obtaining the DVMT white paper http://developer.intel.com/design/chipsets/845g/
1.8.1.3 Zone Rendering Technology (ZRT)
The Intel Extreme Graphics Controller supports Zone Rendering Technology (ZRT). ZRT is a
process by which the screen is divided into several zones. Each zone is completely cached and
rendered on chip before being written to the frame buffer. The benefits of ZRT include the
following:
• Increased memory efficiency via better localization of data
• Increased on-chip processing speed due to decreased wait time for data
• Increased effective pixel fill rates
31
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
• Increased headroom for larger resolution and color depth
• Reduced power as a result of decreased memory bandwidth
• Reduction in depth and color bandwidth associated with conventional rendering
For information about Refer to
Obtaining the Zone Rendering white paper http://developer.intel.com/design/chipsets/845g/
1.8.1.4 AGP Connector
The AGP connector supports either:
• 1x, 2x, or 4x AGP add-in cards with 1.5 V I/O
• AGP Digital Display (ADD) cards
For information about Refer to
Obtaining the Accelerated Graphics Port Interface Specification Section 1.5, page 20
INTEGRATOR’S NOTES
#
• Install memory in the DIMM sockets prior to installing the AGP video card to avoid
interference with the memory retention mechanism.
• The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy
3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V
AGP cards.
1.8.1.5 AGP Digital Display (ADD) Card Support
The GMCH routes two 12-bit multiplexed DVO ports that are each capable of driving a 165 MHz
pixel clock to the AGP connector. The DVO ports can be paired for dual channel mode. In dual
channel mode, the GMCH is capable of driving a 24-bit 330 MHz pixel clock. When an AGP addin card is used, the Intel Extreme Graphics controller is disabled and the AGP connector operates
in AGP mode. When an ADD card is detected, the Intel Extreme Graphics controller is enabled
and the AGP connector is configured for DVO mode. DVO mode enables the DVO ports to be
accessed by an ADD card. ADD cards can support up to two display devices with the following
configurations:
• TV-Out
• Transition Minimized Differential Signaling (TMDS)
• Low Voltage Differential Signaling (LVDS)
• Single device operating in dual channel mode
INTEGRATOR’S NOTES
#
• Synchronous display is not supported when one of the display devices is a TV.
32
• Digital Visual Interface (DVI) support is present only when an ADD card is installed.
Product Description
1.8.2 USB
The Desktop Boards support up to six USB 2.0 ports and fully support UHCI and EHCI and use
UHCI- and EHCI-compatible drivers. For more than six USB devices, an external hub can be
connected to any of the ports.
The ICH4 provides the USB controller for all ports, as shown in Figure 7. The port arrangement is
as follows:
• Two ports are implemented with stacked back panel connectors, adjacent to the PS/2
connectors
• Two ports are implemented with stacked back panel connectors, adjacent to the audio
connectors
• Two ports are routed to the front panel USB connector
Back panel USB connectors
adjacent to the PS/2 ports
Back panel USB connectors
adjacent to the audio connectors
Front panel USB connectors
OM14260
✏
I/O Controller Hub
NOTE
82801DB
(ICH4)
USB
USB
USB
Figure 7. USB Port Configuration
USB ports (2)
USB ports (2)
USB ports (2)
Computer systems that have an unshielded cable attached to a USB port may not meet FCC
Class B requirements, even if no device is attached to the cable. Use shielded cable that meets the
requirements for full-speed devices.
✏ NOTE
USB 2.0 support has been tested with Windows 2000 and Windows XP drivers and is not currently
supported by any other operating system.
For information about Refer to
The location of the USB connectors on the back panel Figure 12, page 60
The location of the front panel USB connector Figure 17, page 69
The EHCI, front panel, UHCI, and USB specifications Section 1.5, page 20
33
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.8.3 IDE Support
1.8.3.1 IDE Interfaces
The ICH4’s IDE controller has two independent bus-mastering IDE interfaces that can be
independently enabled. The IDE interfaces support the following modes:
• Programmed I/O (PIO): processor controls data transfer.
• 8237-style DMA: DMA offloads the processor, supporting transfer rates of up to 16 MB/sec.
• Ultra DMA: DMA protocol on IDE bus supporting host and target throttling and transfer rates
of up to 33 MB/sec.
• ATA-66: DMA protocol on IDE bus supporting host and target throttling and transfer rates of
up to 66 MB/sec. ATA-66 protocol is similar to Ultra DMA and is device driver compatible.
• ATA-100: DMA protocol on IDE bus allows host and target throttling. The ICH4’s ATA-100
logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to 88 MB/sec.
✏ NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections,
noise, and inductive coupling.
The IDE interfaces also support ATAPI devices (such as CD-ROM drives) and ATA devices using
the transfer modes listed in Section 4.4.4.1 on page 104.
The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS)
translation modes. The drive reports the transfer rate and translation mode to the BIOS.
The Desktop Boards support Laser Servo (LS-120) diskette technology through the IDE interfaces.
An LS-120 drive can be configured as a boot device by setting the BIOS Setup program’s Boot
menu to one of the following:
• ARMD-FDD (ATAPI removable media device – floppy disk drive)
• ARMD-HDD (ATAPI removable media device – hard disk drive)
For information about Refer to
The location of the IDE connectors on the D845GERG2 board Figure 15, page 67
The location of the IDE connectors on the D845GEBV2 board Figure 16, page 68
1.8.3.2 SCSI LED Connector
The SCSI LED connector is a 1 x 2-pin connector that allows an add-in SCSI controller (or other
add-in card hard drive controller) to use the same LED as the onboard IDE controller. For proper
operation, this connector should be wired to the LED output of the add-in SCSI controller. The
LED indicates when data is being read from, or written to, both the add-in SCSI controller and the
IDE controller.
For information about Refer to
The location of the SCSI LED connector on the D845GERG2 board Figure 15, page 67
The location of the SCSI LED connector on the D845GEBV2 board Figure 16, page 68
The signal names of the SCSI LED connector Table 34, page 68
34
Product Description
1.8.4 Real-Time Clock, CMOS SRAM, and Battery
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer
is not plugged into a wall socket, the battery has an estimated life of three years. When the
computer is plugged in, the standby current from the power supply extends the life of the battery.
The clock is accurate to ± 13 minutes/year at 25 ºC with 3.3 VSB applied.
✏ NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS
RAM at power-on.
1.9 I/O Controller
The SMSC LPC47M172 I/O controller provides the following features:
• One serial port
• One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
• Serial IRQ interface compatible with serialized IRQ support for PCI systems
• PS/2-style mouse and keyboard interfaces
• Interface for one 1.44 MB or 2.88 MB diskette drive
• Intelligent power management, including a programmable wake-up event interface
• PCI power management support
The BIOS Setup program provides configuration options for the I/O controller.
For information about Refer to
SMSC LPC47M172 I/O controller http://www.smsc.com
1.9.1 Serial Port
The boards have one serial port connector located on the back panel. The serial port supports data
transfers at speeds up to 115.2 kbits/sec with BIOS support.
For information about Refer to
The location of the serial port A connector Figure 12, page 60
1.9.2 Parallel Port
The 25-pin D-Sub parallel port connector is located on the back panel. Use the BIOS Setup
program to set the parallel port mode.
For information about Refer to
The location of the parallel port connector Figure 12, page 60
Setting the parallel port’s mode Table 58, page 101
35
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.9.3 Diskette Drive Controller
The I/O controller supports one diskette drive. Use the BIOS Setup program to configure the
diskette drive interface.
For information about Refer to
The location of the diskette drive connector on the D845GERG2 board Figure 15, page 67
The location of the diskette drive connector on the D845GEBV2 board Figure 16, page 68
The supported diskette drive capacities and sizes Table 61, page 106
1.9.4 Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel.
NOTE
✏
The keyboard is supported in the bottom PS/2 connector and the mouse is supported in the top
PS/2 connector. Power to the computer should be turned off before a keyboard or mouse is
connected or disconnected.
For information about Refer to
The location of the keyboard and mouse connectors Figure 12, page 60
36
Product Description
1.10 Audio Subsystem
The audio subsystem consists of the following devices:
• Intel 82801DB I/O Controller Hub (ICH4)
• Analog Devices AD1981B audio codec
The audio subsystem includes these features:
• Split digital/analog architecture for improved S/N (signal-to-noise) ratio: ≥ 85 dB
• Power management support for ACPI 2.0 (driver dependant)
• Mono/Stereo mic in pre-amp that supports dynamic, condenser, and electret microphones
The audio subsystem supports the following audio interfaces:
• ATAPI-style connectors:
Auxiliary line in
CD-ROM
• Front panel audio connector, including pins for:
Line out
Mic in (mono or stereo)
• Back panel audio connectors:
Line out
Line in
Mic in (mono or stereo)
Figure 8 is a block diagram of the audio subsystem.
82801DB
I/O Controller Hub
(ICH4)
Figure 8. Audio Subsystem Block Diagram
For information about Refer to
Upgrading the onboard audio subsystem using a CNR audio card Section 1.12, page 40
The front panel audio connector Section 2.8.2.2, page 62
The back panel audio connectors Section 2.8.1, page 60
AC ’97
Link
AD1981B
Audio Codec
Line In
Line Out
Mic In
Auxiliary Line In
CD-ROM
OM15116
37
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.10.1 Audio Connectors
1.10.1.1 Front Panel Audio Connector
A 2 x 5-pin connector provides mic in and line out signals for front panel audio connectors.
For information about Refer to
The location of the connector Figure 13, page 62
The signal names of the front panel audio connector Table 25, page 64
Obtaining the Front Panel I/O Connectivity Design Guide Section 1.5, page 20
NOTE
✏
The front panel audio connector is alternately used as a jumper block for routing audio signals.
Refer to Section 2.9.1 on page 72 for more information.
1.10.1.2 Auxiliary Line In Connector
A 1 x 4-pin ATAPI-style connector connects the left and right channel signals of an internal audio
device to the audio subsystem.
For information about Refer to
The location of the auxiliary line in connector Figure 13, page 62
The signal names of the auxiliary line in connector Table 26, page 64
1.10.1.3 ATAPI CD-ROM Audio Connector
A 1 x 4-pin ATAPI-style connector connects an internal ATAPI CD-ROM drive to the audio
mixer.
For information about Refer to
The location of the ATAPI CD-ROM connector Figure 13, page 62
The signal names of the ATAPI CD-ROM connector Table 28, page 64
1.10.2 Audio Subsystem Software
Audio software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining audio software and drivers Section 1.3, page 19
38
Product Description
1.11 LAN Subsystem (Optional)
The Network Interface Controller subsystem consists of the ICH4 (with integrated LAN Media
Access Controller) and a physical layer interface device. Features of the LAN subsystem include:
• PCI Bus Master interface
• CSMA/CD Protocol Engine
• Serial CSMA/CD unit interface that supports the 82562ET (10/100 Mbit/sec Ethernet) on the
CNR bus
• PCI Power Management
Supports ACPI technology
Supports LAN wake capabilities
The Desktop Board D845GERG2 supports a Gigabit Ethernet Controller option, described below.
1.11.1 Intel® 82562ET Platform LAN Connect Device
The Intel 82562ET component provides an interface to the back panel RJ-45 connector with
integrated LEDs. This physical interface may alternately be provided through the CNR connector.
The Intel 82562ET provides the following functions:
• Basic 10/100 Ethernet LAN connectivity
• Supports RJ-45 connector with status indicator LEDs on the back panel
• Full device driver compatibility
• ACPI support
• Programmable transit threshold
• Configuration EEPROM that contains the MAC address
1.11.2 Intel® 82540EM Gigabit Ethernet Controller
The Intel 82540EM Gigabit Ethernet Controller (available only on the Desktop Board
D845GERG2) provides the following functions:
• Gigabit Ethernet MAC and PHY layer functions in a single component
• Basic 10/100/1000 Ethernet LAN connectivity
• Integrated PHY for 10/100/1000 Mbit/sec full and half duplex operation
• Supports RJ-45 connector with status indicator LEDs on the back panel
• ACPI support
• Configuration EEPROM that contains the MAC address
1.11.3 RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector. Table 12 describes the LED states when the
Desktop Board is powered up and the 10/100 LAN subsystem is operating.
39
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 12. 10/100 Ethernet LAN Connector LED States
LED Color LED State Condition
Off 10 Mbit/sec data rate is selected. Green
On 100 Mbit/sec data rate is selected.
Yellow
Off LAN link is not established.
On (steady state) LAN link is established.
On (brighter and pulsing) The computer is communicating with another computer on
the LAN.
Table 13 describes the LED states when the Desktop Board is powered up and the 10/100/1000
LAN subsystem is operating.
Table 13. 10/100/1000 Ethernet LAN Connector LED States
LED Color LED State Condition
Green/Yellow
Yellow
Off 10 Mbit/sec data rate is selected.
Green 100 Mbit/sec data rate is selected.
Yellow 1 Gbit/sec data rate is selected.
Off LAN link is not established.
On (steady state) LAN link is established.
On (brighter and
pulsing)
The computer is communicating with another computer on
the LAN.
1.11.4 LAN Subsystem Software
LAN software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining LAN software and drivers Section 1.3, page 19
1.12 CNR (Optional)
The Communication and Networking Riser (CNR) connector provides an interface that supports
the audio, modem, and LAN interfaces of the Intel 845GE chipset. Figure 9 shows the signal
interface between the riser and the ICH4.
Communication and
Networking Riser
(Up to two AC ’97 codecs
and one LAN device)
CNR Connector
OM14262
Intel 82801DB
I/O Controller Hub
(ICH4)
Figure 9. ICH4 and CNR Signal Interface
AC ’97 Interface
LAN Interface
SMBus
40
Product Description
The interfaces supported by the CNR include the following:
• AC ’97 interface: supports audio and/or modem functions on the CNR card.
• LAN interfaces: an eight-pin interface for use with Platform LAN Connection (PLC) based
devices.
• SMBus interface: provides Plug-and-Play functionality for the CNR card.
The CNR connector includes power signals required for power management and for CNR card
operation. To learn more about the CNR, refer to the CNR specification.
The onboard two-channel audio subsystem can be upgraded to four- or six-channel audio using a
CNR audio upgrade card in a slave configuration. CNR audio upgrade cards are available in
multiple configurations from several vendors supporting analog or S/P-DIF digital connections.
For information about Refer to
CNR audio upgrade cards http://developer.intel.com/technology/cnr/
INTEGRATOR’S NOTES
#
• If you install a CNR card that cannot support a multichannel audio upgrade, the Desktop
Boards’ integrated audio codec will be disabled. This only applies to D845GEBV2 and
D845GERG2 boards that have both the onboard audio subsystem and a CNR.
• The brand and type of audio codec used on the CNR card must match that of the Desktop
Boards’ codec (Analog Devices AD1981B).
• Check with your CNR vendor to ensure that the CNR card has been tested with
ICH4-based systems.
• There is no USB interface routed to the CNR connector.
For information about Refer to
Obtaining the CNR specification Section 1.5, page 20
41
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.13 Hardware Management Subsystem
The hardware management features enable the Desktop Boards to be compatible with the Wired
for Management (WfM) specification. The Desktop Board has several hardware management
features, including the following:
• Fan monitoring and control (through the I/O controller or the hardware monitoring and fan
control ASIC)
• Thermal and voltage monitoring
• Chassis intrusion detection
For information about Refer to
The WfM specification Section 1.5, page 20
1.13.1 Hardware Monitoring ASICs
The Desktop Boards provide one of the following:
• A hardware monitoring ASIC
• A hardware monitoring and fan control ASIC
The features of these components are described in this section. Contact your Intel sales
representative to determine which type of hardware monitoring ASIC is present on your Intel
Desktop Board.
1.13.1.1 Hardware Monitoring ASIC
The features of the hardware monitoring ASIC include:
• Internal ambient temperature sensor
• Remote thermal diode sensor for direct monitoring of processor temperature
• Power supply monitoring of four voltages (+5 V, +3.3 VSB, +1.5 V, and +VCCP) to detect
levels above or below acceptable values
• SMBus interface
For information about Refer to
The location of the fan connectors and sensors for thermal monitoring Figure 10, page 43
1.13.1.2 Hardware Monitoring and Fan Control ASIC
The features of the hardware monitoring and fan control ASIC include:
• Internal ambient temperature sensor
• Two remote thermal diode sensors for direct monitoring of processor temperature and ambient
temperature sensing
• Power supply monitoring of five voltages (+5 V, +12 V, +3.3 VSB, +1.5 V, and +VCCP) to
detect levels above or below acceptable values
• Thermally monitored closed-loop fan control, for all three fans, that can adjust the fan speed or
switch the fans on or off as needed
• SMBus interface
42
For information about Refer to
The location of the fan connectors and sensors for thermal monitoring Figure 10, page 43
1.13.1.3 Thermal Monitoring
Figure 10 shows the location of the sensors and fan connectors.
E
Product Description
C
A
B
DF
OM15025
Item Description
A
B
C
D
E
F
Note: This sensor is present only on Desktop Boards with the hardware monitoring and fan control ASIC.
Thermal diode, located on processor die
Ambient temperature sensor, internal to both hardware monitoring ASIC options
(Note)
Remote ambient temperature sensor
Processor fan
Rear chassis fan
Front chassis fan
Figure 10. Thermal Monitoring
43
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.13.2 Fan Monitoring
Fan monitoring can be implemented using Intel® Active Monitor, Intel® LANDesk® Client
Manager, or third-party software. The level of monitoring and control is dependent on the
hardware monitoring ASIC used with the Desktop Board.
For information about Refer to
The functions of the fan connectors Section 1.14.2.2, page 48
1.13.3 Chassis Intrusion and Detection
The Desktop Boards D845GEBV2 and D845GERG2 support a chassis security feature that detects
if the chassis cover is removed. The security feature uses a mechanical switch on the chassis that
attaches to the chassis intrusion connector. When the chassis cover is removed, the mechanical
switch is in the closed position.
1.14 Power Management
Power management is implemented at several levels, including:
• Software support through Advanced Configuration and Power Interface (ACPI)
• Hardware support:
Power connector
Fan connectors
LAN wake capabilities
Instantly Available PC technology
Resume on Ring
Wake from USB
Wake from PS/2 devices
Power Management Event signal (PME#) wake-up support
44
Product Description
1.14.1 ACPI
ACPI gives the operating system direct control over the power management and Plug and Play
functions of a computer. The use of ACPI with the Desktop Boards D845GEBV2 and
D845GERG2 requires an operating system that provides full ACPI support. ACPI features
include:
• Plug and Play (including bus and device enumeration)
• Power management control of individual devices, add-in boards (some add-in boards may
require an ACPI-aware driver), video displays, and hard disk drives
• Methods for achieving less than 15-watt system operation in the power-on/standby
sleeping state
• A Soft-off feature that enables the operating system to power-off the computer
• Support for multiple wake-up events (see Table 16 on page 47)
• Support for a front panel power and sleep mode switch
Table 14 lists the system states based on how long the power switch is pressed, depending on how
ACPI is configured with an ACPI-aware operating system.
Table 14. Effects of Pressing the Power Switch
If the system is in this state…
Off
(ACPI G2/G5 – Soft off)
On
(ACPI G0 – working state)
On
(ACPI G0 – working state)
Sleep
(ACPI G1 – sleeping state)
Sleep
(ACPI G1 – sleeping state)
…and the power switch is
pressed for
Less than four seconds Power-on
Less than four seconds Soft-off/Standby
More than four seconds Fail safe power-off
Less than four seconds Wake-up
More than four seconds Power-off
…the system enters this state
(ACPI G0 – working state)
(ACPI G1 – sleeping state)
(ACPI G2/G5 – Soft off)
(ACPI G0 – working state)
(ACPI G2/G5 – Soft off)
For information about Refer to
The Desktop Boards’ compliance level with ACPI Section 1.5, page 20
45
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.14.1.1 System States and Power States
Under ACPI, the operating system directs all system and device power state transitions. The
operating system puts devices in and out of low-power states based on user preferences and
knowledge of how devices are being used by applications. Devices that are not being used can be
turned off. The operating system uses information from applications and user settings to put the
system as a whole into a low-power state.
Table 15 lists the power states supported by the Desktop Boards D845GEBV2 and D845GERG2
along with the associated system power targets. See the ACPI specification for a complete
description of the various system and power states.
Table 15. Power States and Targeted System Power
Global States Sleeping States
G0 – working
state
G1 – sleeping
state
G1 – sleeping
state
G1 – sleeping
state
G2/S5 S5 – Soft off.
G3 –
mechanical off
AC power is
disconnected
from the
computer.
Notes:
1. Total system power is dependent on the system configuration, including add-in boards and peripherals powered
by the system chassis’ power supply.
2. Dependent on the standby power consumption of wake-up devices used in the system.
S0 – working C0 – working D0 – working
S1 – Processor
stopped
S3 – Suspend to
RAM. Context
saved to RAM.
S4 – Suspend to
disk. Context
saved to disk.
Context not saved.
Cold boot is
required.
No power to the
system.
Processor
States
C1 – stop
grant
No power D3 – no power
No power D3 – no power
No power D3 – no power
No power D3 – no power for
Device States
state.
D1, D2, D3 –
device
specification
specific.
except for
wake-up logic.
except for
wake-up logic.
except for
wake-up logic.
wake-up logic,
except when
provided by
battery or external
source.
Targeted System
Power
Full power > 30 W
5 W < power < 52.5 W
Power < 5 W
Power < 5 W
Power < 5 W
No power to the system.
Service can be performed
safely.
(Note 1)
(Note 2)
(Note 2)
(Note 2)
46
Product Description
1.14.1.2 Wake-up Devices and Events
Table 16 lists the devices or specific events that can wake the computer from specific states.
Table 16. Wake-up Devices and Events
These devices/events can wake up the computer… …from this state
CNR S1, S3, S4, S5
LAN S1, S3, S4, S5
Modem (back panel Serial Port A) S1, S3
PME# signal S1, S3, S4, S5
Power switch S1, S3, S4, S5
PS/2 devices S1, S3
RTC alarm S1, S3, S4, S5
USB S1, S3
Note: For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On
will enable a wake-up event from LAN in the S5 state.
(Note)
(Note)
NOTE
✏
The use of these wake-up events from an ACPI state requires an operating system that provides full
ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake
events.
1.14.2 Hardware Support
CAUTION
Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities
and Instantly Available PC technology features are used. Failure to do so can damage the power
supply. The total amount of standby current required depends on the wake devices supported and
manufacturing options. Refer to Section 2.11.3 on page 79 for additional information.
The Desktop Boards D845GEBV2 and D845GERG2 provide several power management hardware
features, including:
• Power connector
• Fan connectors
• LAN wake capabilities
• Instantly Available PC technology
• Resume on Ring
• Wake from USB
• Wake from PS/2 keyboard
• PME# signal wake-up support
LAN wake capabilities and Instantly Available PC technology require power from the +5 V
standby line. The sections discussing these features describe the incremental standby power
requirements for each.
47
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Resume on Ring enables telephony devices to access the computer when it is in a power-managed
state. The method used depends on the type of telephony device (external or internal).
NOTE
✏
The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an
operating system that provides full ACPI support.
1.14.2.1 Power Connector
ATX12V- and SFX12V-compliant power supplies can turn off the system power through system
control. When an ACPI-enabled system receives the correct command, the power supply removes
all non-standby voltages.
When resuming from an AC power failure, the computer returns to the power state it was in before
power was interrupted (on or off). The computer’s response can be set using the Last Power State
feature in the BIOS Setup program’s Boot menu.
For information about Refer to
The location of the power connector Figure 13, page 62
The signal names of the power connector Table 31, page 66
The BIOS Setup program’s Boot menu Table 70, page 115
The ATX and SFX specifications Section 1.5, page 20
1.14.2.2 Fan Connectors
Table 17 summarizes the function/operation of the fan connectors for Desktop Boards with the
hardware monitoring ASIC. Table 18 summarizes the function/operation of the fan connectors for
Desktop Boards with the hardware monitoring and fan control ASIC.
Table 17. Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring ASIC
Connector Description
Processor fan • +12 V DC connection for a processor fan or active fan heatsink.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the I/O controller.
Front chassis fan • +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
Rear chassis fan • +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the I/O controller.
48
Table 18. Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring and Fan Control ASIC
Connector Description
Processor fan • +12 V DC connection for a processor fan or active fan heatsink.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
• Closed-loop fan control that can adjust the fan speed or switch the fans on or off
as needed.
Front chassis fan • +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
• Closed-loop fan control that can adjust the fan speed or switch the fans on or off
as needed.
Rear chassis fan • +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
• Closed-loop fan control that can adjust the fan speed or switch the fans on or off
as needed.
For information about Refer to
The location of the fan connectors Figure 13, page 62
The location of the fan connectors and sensors for thermal monitoring Figure 10, on page 43
The signal names of the fan connectors Section 2.8.2.2, page 62
Product Description
1.14.2.3 LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the +5 V standby line for the power supply must be capable of
providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing LAN wake capabilities can damage the power supply. Refer to Section 2.11.3 on
page 79 for additional information.
LAN wake capabilities enable remote wake-up of the computer through a network. The LAN
subsystem PCI bus network adapter monitors network traffic at the Media Independent Interface.
†
Upon detecting a Magic Packet
up the computer. Depending on the LAN implementation, the Desktop Boards D845GEBV2 and
D845GERG2 support LAN wake capabilities with ACPI in the following ways:
• The PCI bus PME# signal for PCI 2.2 compliant LAN designs
• The onboard LAN subsystem
• A CNR-based LAN subsystem
frame, the LAN subsystem asserts a wake-up signal that powers
49
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.14.2.4 Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the +5 V standby line for the power supply must be
capable of providing adequate +5 V standby current. Failure to provide adequate standby current
when implementing Instantly Available PC technology can damage the power supply. Refer to
Section 2.11.3 on page 79 for additional information.
Instantly Available PC technology enables the Desktop Boards D845GEBV2 and D845GERG2 to
enter the ACPI S3 (Suspend-to-RAM) sleep-state. While in the S3 sleep-state, the computer will
appear to be off (the power supply is off, and the front panel LED is amber if dual colored, or off if
single colored.) When signaled by a wake-up device or event, the system quickly returns to its last
known wake state. Table 16 on page 47 lists the devices and events that can wake the computer
from the S3 state.
The Desktop Boards D845GEBV2 and D845GERG2 support the PCI Bus Power Management
Interface Specification. For information on the version of this specification, see Section 1.5.
Add-in boards that also support this specification can participate in power management and can be
used to wake the computer.
The use of Instantly Available PC technology requires operating system support and PCI 2.2
compliant add-in cards and drivers.
50
Product Description
1.14.2.5 +5 V Standby Power Indicator LED
The +5 V standby power indicator LED shows that power is still present even when the computer
appears to be off. Figure 11 shows the location of the standby power indicator LED on the
D845GEBV2 board.
CAUTION
If AC power has been switched off and the standby power indicator is still lit, disconnect the power
cord before installing or removing any devices connected to the board. Failure to do so could
damage the board and any attached devices.
CR8H1
Figure 11. Location of the Standby Power Indicator LED on the D845GEBV2 Board
1.14.2.6 Resume on Ring
The operation of Resume on Ring can be summarized as follows:
• Resumes operation from ACPI S1 or S3 states
• Detects incoming call similarly for external and internal modems
• Requires modem interrupt be unmasked for correct operation
OM13582
51
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.14.2.7 Wake from USB
USB bus activity wakes the computer from ACPI S1 or S3 states.
NOTE
✏
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
1.14.2.8 Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
1.14.2.9 PME# Signal Wake-up Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, S4,
or S5 state (with Wake on PME enabled in BIOS).
52
2 Technical Reference
What This Chapter Contains
2.1 Introduction.................................................................................................................53
2.2 Memory Map ..............................................................................................................53
2.3 Fixed I/O Map.............................................................................................................54
2.4 DMA Channels ...........................................................................................................55
2.5 PCI Configuration Space Map ....................................................................................55
2.6 Interrupts ....................................................................................................................56
2.7 PCI Interrupt Routing Map..........................................................................................57
2.8 Connectors.................................................................................................................59
2.9 Jumper Blocks............................................................................................................72
2.10 Mechanical Considerations.........................................................................................74
2.11 Electrical Considerations ............................................................................................78
2.12 Thermal Considerations..............................................................................................81
2.13 Reliability ....................................................................................................................84
2.14 Environmental ............................................................................................................84
2.15 Regulatory Compliance ..............................................................................................85
2.1 Introduction
Sections 2.2 - 2.6 contain several standalone tables. Table 19 describes the system memory map,
Table 20 shows the I/O map, Table 21 lists the DMA channels, Table 22 defines the PCI
configuration space map, and Table 23 describes the interrupts. The remaining sections in this
chapter are introduced by text found with their respective section headings.
2.2 Memory Map
Table 19. System Memory Map
Address Range (decimal) Address Range (hex) Size Description
1024 K - 2097152 K 100000 - 7FFFFFFF 2047 MB Extended memory
960 K - 1024 K F0000 - FFFFF 64 KB Runtime BIOS
896 K - 960 K E0000 - EFFFF 64 KB Reserved
800 K - 896 K C8000 - DFFFF 96 KB Available high DOS memory (open
to the PCI bus)
640 K - 800 K A0000 - C7FFF 160 KB Video memory and BIOS
639 K - 640 K 9FC00 - 9FFFF 1 KB Extended BIOS data (movable by
memory manager software)
512 K - 639 K 80000 - 9FBFF 127 KB Extended conventional memory
0 K - 512 K 00000 - 7FFFF 512 KB Conventional memory
53
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.3 Fixed I/O Map
Table 20. I/O Map
Address (hex) Size Description
0000 - 00FF 256 bytes Used by the Desktop Board D845GEBV2/D845GERG2.
Refer to the ICH4 data sheet for dynamic addressing
information.
0170 - 0177 8 bytes Secondary IDE channel
01F0 - 01F7 8 bytes Primary IDE channel
0228 - 022F
0278 - 027F
02E8 - 02EF
02F8 - 02FF
0376 1 byte Secondary IDE channel command port
0377, bits 6:0 7 bits Secondary IDE channel status port
0378 - 037F 8 bytes LPT1
03B0 - 03BB 12 bytes Intel 82845GE GMCH
03C0 - 03DF 32 bytes Intel 82845GE GMCH
03E8 - 03EF 8 bytes COM3
03F0 - 03F5 6 bytes Diskette channel 1
03F6 1 byte Primary IDE channel command port
03F8 - 03FF 8 bytes COM1
04D0 - 04D1 2 bytes Edge/level triggered PIC
LPTn + 400 8 bytes ECP port, LPTn base address + 400h
0CF8 - 0CFB
0CF9
0CFC - 0CFF 4 bytes PCI configuration data register
FFA0 - FFA7 8 bytes Primary bus master IDE registers
FFA8 - FFAF 8 bytes Secondary bus master IDE registers
Notes:
1. Default, but can be changed to another address range
2. Dword access only
3. Byte access only
(Note 1)
8 bytes LPT3
(Note 1)
8 bytes LPT2
(Note 1)
8 bytes COM4
(Note 1)
8 bytes COM2
(Note 2)
4 bytes PCI configuration address register
(Note 3)
1 byte Turbo and reset control register
✏ NOTE
Some additional I/O addresses are not available due to ICH4 address aliassing. The ICH4 data
sheet provides more information on address aliassing.
For information about Refer to
Obtaining the ICH4 data sheet Section 1.3 on page 19
54
Technical Reference
2.4 DMA Channels
Table 21. DMA Channels
DMA Channel Number Data Width System Resource
0 8 or 16 bits Open
1 8 or 16 bits Parallel port
2 8 or 16 bits Diskette drive
3 8 or 16 bits Parallel port (for ECP or EPP)
4 8 or 16 bits DMA controller
5 16 bits Open
6 16 bits Open
7 16 bits Open
2.5 PCI Configuration Space Map
Table 22. PCI Configuration Space Map
Bus
Number (hex)
00 00 00 Memory controller of Intel 82845GE component
00 01 00 Host to AGP bridge (virtual P2P)
00 1E 00 Hub link to PCI bridge
00 1F 00 Intel 82801DB ICH4 PCI to LPC bridge
00 1F 01 IDE controller
00 1F 03 SMBus controller
00 1F 05 AC ’97 audio controller
00 1F 06 AC ’97 modem controller
00 1D 00 USB UHCI controller 1
00 1D 01 USB UHCI controller 2
00 1D 02 USB UHCI controller 3
00 1D 07 EHCI controller
01 00 00 AGP add-in card
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
Notes: 1. Bus number = 01 when the Intel Extreme Graphics controller is used. Bus number = 02 when an AGP add-
in card is used.
2. Desktop Board D845GEBV2 only
Device
Number (hex)
Function
Number (hex) Description
08 00 LAN controller (optional)
00 00 PCI bus connector 1
01 00 PCI bus connector 2
02 00 PCI bus connector 3
03 00 PCI bus connector 4
04 00 PCI bus connector 5
05 00 PCI bus connector 6
(Note 2)
(Note 2)
(Note 2)
55
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.6 Interrupts
The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the
Advanced Programmable Interrupt Controller (APIC) portion of the ICH4 component. The PIC is
supported in Windows 98 SE and Windows ME and uses the first 16 interrupts. The APIC is
supported in Windows 2000 and Windows XP and supports a total of 24 interrupts.
Table 23. Interrupts
IRQ System Resource
NMI I/O channel check
0 Reserved, interval timer
1 Reserved, keyboard buffer full
2 Reserved, cascade interrupt from slave PIC
3 COM2
4 COM1
5 LPT2 (Plug and Play option)/User available
6 Diskette drive
7 LPT1
8 Real-time clock
9 Reserved for ICH4 system management bus
10 User available
11 User available
12 Onboard mouse port (if present, else user available)
13 Reserved, math coprocessor
14 Primary IDE (if present, else user available)
15 Secondary IDE (if present, else user available)
(Note 2)
16
17
18
19
20
21
22
23
Notes:
1. Default, but can be changed to another IRQ.
2. Available in APIC mode only.
USB UHCI controller 1 (through PIRQA)
(Note 2)
AC ’97 audio/modem/User available (through PIRQB)
(Note 2)
ICH4 USB controller 3 (through PIRQC)
(Note 2)
ICH4 USB controller 2 (through PIRQD)
(Note 2)
ICH4 LAN (optional) (through PIRQE)
(Note 2)
User available (through PIRQF)
(Note 2)
User available (through PIRQG)
(Note 2)
ICH4 USB 2.0 EHCI controller/User available (through PIRQH)
(Note 1)
(Note 1)
(Note 1)
56
Technical Reference
2.7 PCI Interrupt Routing Map
This section describes interrupt sharing and how the interrupt signals are connected between the
PCI bus connectors and onboard PCI devices. The PCI specification specifies how interrupts can
be shared between devices attached to the PCI bus. In most cases, the small amount of latency
added by interrupt sharing does not affect the operation or throughput of the devices. In some
special cases where maximum performance is needed from a device, a PCI device should not share
an interrupt with other PCI devices. Use the following information to avoid sharing an interrupt
with a PCI add-in card.
PCI devices are categorized as follows to specify their interrupt grouping:
• INTA: By default, all add-in cards that require only one interrupt are in this category. For
almost all cards that require more than one interrupt, the first interrupt on the card is also
classified as INTA.
• INTB: Generally, the second interrupt on add-in cards that require two or more interrupts is
classified as INTB. (This is not an absolute requirement.)
• INTC and INTD: Generally, a third interrupt on add-in cards is classified as INTC and a
fourth interrupt is classified as INTD.
The ICH4 has eight Programmable Interrupt Request (PIRQ) input signals. All PCI interrupt
sources either onboard or from a PCI add-in card connect to one of these PIRQ signals. Some PCI
interrupt sources are electrically tied together on the Desktop Boards D845GEBV2 and
D845GERG2 and therefore share the same interrupt. Table 24 shows an example of how the
PIRQ signals are routed.
For example, using Table 24 as a reference, assume an add-in card using INTA is plugged into PCI
bus connector 3. In PCI bus connector 3, INTA is connected to PIRQC, which is already
connected to the ICH4 USB. The add-in card in PCI bus connector 3 now shares an interrupt with
the onboard interrupt source.
57
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 24. PCI Interrupt Routing Map
PCI Interrupt Source
AGP connector INTA INTB
ICH4 USB UHCI controller 1 INTA
SMBus controller INTB
ICH4 USB UHCI controller 2 INTB
AC ’97 ICH4 Audio/Modem INTB
ICH4 LAN INTA
ICH4 USB UHCI controller 3 INTC
ICH4 USB 2.0 EHCI controller
PCI bus connector 1 INTD INTA INTB INTC
PCI bus connector 2 INTC INTB INTA INTD
PCI bus connector 3 INTD INTC INTA INTB
PCI bus connector 4
PCI bus connector 5
PCI bus connector 6
Note: Desktop Board D845GEBV2 only
(Note)
(Note)
(Note)
PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH
INTD
INTB INTA INTC INTD
INTC INTA INTD INTB
INTA INTB INTD INTC
ICH4 PIRQ Signal Name
NOTE
✏
In PIC mode, the ICH4 can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 6,
7, 9, 10, 11, 12, 14, and 15). Typically, a device that does not share a PIRQ line will have a
unique interrupt. However, in certain interrupt-constrained situations, it is possible for two or
more of the PIRQ lines to be connected to the same IRQ signal. Refer to Table 23 for the
allocation of PIRQ lines to IRQ signals in APIC mode.
58
Technical Reference
2.8 Connectors
CAUTION
Only the back panel USB, front panel USB, VGA, and PS/2 connectors of the Desktop Boards
D845GEBV2 and D845GERG2 have overcurrent protection. The Desktop Boards’ internal
connectors are not overcurrent protected and should connect only to devices inside the computer’s
chassis, such as fans and internal peripherals. Do not use these connectors to power devices
external to the computer’s chassis. A fault in the load presented by the external devices could
cause damage to the computer, the interconnecting cable, and the external devices themselves.
This section describes the Desktop Board’s connectors. The connectors can be divided into these
groups:
• Back panel I/O connectors (see page 60)
PS/2 keyboard and mouse
USB (four ports)
Parallel port
Serial port A
LAN (optional)
Audio (line out, line in, and mic in)
• Internal I/O connectors (see page 61)
Audio (auxiliary line input, ATAPI CD-ROM, and front panel audio)
Fans
Power
Add-in boards (PCI and AGP)
CNR (optional)
IDE
Diskette drive
SCSI LED
Chassis intrusion
• External I/O connectors (see page 69)
Front panel USB (one connector for two ports)
Auxiliary front panel power/sleep/message-waiting LED
Front panel (power/sleep/message-waiting LED, power switch, hard drive activity LED,
reset switch, and auxiliary front panel power LED)
NOTE
✏
When installing the D845GERG2 board in a microATX chassis, make sure that peripheral devices
are installed at least 1.5 inches above the main power connector, the diskette drive connector, the
IDE connector, and the DIMM sockets.
59
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.8.1 Back Panel Connectors
Figure 12 shows the location of the back panel connectors. The back panel connectors are
color-coded in compliance with PC 99 recommendations. The figure legend below lists the
colors used.
A
F
I
C
B
DH
Item Description Color
A PS/2 mouse port Green
B PS/2 keyboard port Purple
C USB port Black
D USB port Black
E Serial port A Teal
F Parallel port Burgundy
G VGA port Dark blue
H USB port Black
I LAN (optional) Black
J USB port Black
K Mic in Pink
L Audio line out Lime green
M Audio line in Light blue
G
J K
MLE
OM13577
60
Figure 12. Back Panel Connectors
Technical Reference
NOTE
✏
The back panel audio line out connector is designed to power headphones or amplified speakers
only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.
2.8.2 Internal I/O Connectors
The internal I/O connectors are divided into the following functional groups:
• Audio, power, and hardware control (see page 62)
Auxiliary line in
ATAPI CD-ROM
Front panel audio
Fans
ATX12V power
Main power
• Add-in boards and peripheral interfaces (see page 67)
CNR (optional)
PCI bus
AGP
IDE
Diskette drive
SCSI LED
2.8.2.1 Expansion Slots
The board has the following expansion slots:
• One AGP connector. The AGP connector is keyed for 1.5 V AGP cards only. Do not install a
legacy 3.3 V AGP card. The AGP connector is not mechanically compatible with legacy
3.3 V AGP cards.
• PCI rev 2.2 compliant local bus slots (six on the Desktop Board D845GEBV2, three on the
Desktop Board D845GERG2). The SMBus is routed to PCI bus connector 2 only (ATX
expansion slot 6). PCI add-in cards with SMBus support can access sensor data and other
information residing on the Desktop Board.
• One CNR (optional), shared with PCI bus connector 6 (ATX expansion slot 1) on the Desktop
Board D845GEBV2, or with PCI bus connector 3 (ATX expansion slot 1) on the Desktop
Board D845GERG2.
NOTE
✏
This document references back-panel slot numbering with respect to processor location on the
board. The AGP slot is not numbered. PCI slots are identified as PCI slot #x, starting with the
slot closest to the processor. The CNR slot shares an ATX expansion; slot 6 on the D845GEBV2
board and slot 3 on the D845GERG2 board. The ATX/MicroATX specifications identify expansion
slot locations with respect to the far edge of a full-sized ATX chassis. The ATX specification and
the board’s silkscreen are opposite and could cause confusion. The ATX numbering convention is
made without respect to slot type (PCI vs. AGP), but refers to an actual slot location on a chassis.
Figure 15 (page 67) and Figure 16 (page 68) illustrate the board’s PCI slot numbering.
61
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.8.2.2 Audio, Power, and Hardware Control Connectors
Figure 13 shows the location of the audio, power, and hardware control connectors.
B DC
A
4
2
1
10
9
1
1
4
1
3
E
21
4
3
20
3
1
1
I
H
10
G
Item Description For more information see:
A
Front panel audio Table 25
B Auxiliary line in, ATAPI style (white) Table 26
C Rear chassis fan Table 27
D ATAPI CD-ROM (black) Table 28
E +12 V power connector (ATX12V) Table 29
F Processor fan Table 30
G Main power Table 31
H Chassis intrusion Table 32
I Front chassis fan Table 33
Figure 13. Audio, Power, and Hardware Control Connectors
1
3
11
1
OM13578
F
62
Technical Reference
Figure 14 shows the location of the audio, power, and hardware control connectors on the Desktop
Board D845GERG2 with the Gigabit Ethernet LAN option.
B
A
2
1
10
9
1
I
4
1
3
1
H
DC
1
4
1
3
E
21
4
3
1
3
20
10
11
1
F
G
OM15118
Item Description For more information see:
A
Front panel audio Table 25
B Auxiliary line in, ATAPI style (white) Table 26
C Rear chassis fan Table 27
D ATAPI CD-ROM (black) Table 28
E +12 V power connector (ATX12V) Table 29
F Processor fan Table 30
G Main power Table 31
H Chassis intrusion Table 32
I Front chassis fan Table 33
Figure 14. Audio, Power, and Hardware Control Connectors on the Desktop Board
D845GERG2 with the Gigabit Ethernet LAN option
63
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 25. Front Panel Audio Connector
Pin Signal Name Pin Signal Name
1 MIC_IN 2 Ground
3 MIC_BIAS 4 +5 V
5 RIGHT_OUT 6 RIGHT_IN
7 Ground 8 Key
9 LEFT_OUT 10 LEFT_IN
INTEGRATOR’S NOTE
#
The front panel audio connector is alternately used as a jumper block for routing audio signals.
Refer to Section 2.9.1 on page 72 for more information.
Table 26. Auxiliary Line In Connector
Pin Signal Name
1 Left auxiliary line in
2 Ground
3 Ground
4 Right auxiliary line in
Table 27. Rear Chassis Fan Connector
Pin Signal Name
1 (Note)
2 +12 V
3 REAR_TACH_OUT
Note: Pin 1 is Control if the Desktop Board uses the hardware monitoring and fan control ASIC.
Pin 1 is Ground if the Desktop Board uses the hardware monitoring ASIC.
Table 28. ATAPI CD-ROM Connector
Pin Signal Name
1 Left audio input from CD-ROM
2 CD audio differential ground
3 CD audio differential ground
4 Right audio input from CD-ROM
64
INTEGRATOR’S NOTES
#
• Use only ATX12V-compliant power supplies with these boards. ATX12V power supplies
have an additional power lead that provides required supplemental power for the
processor. Always connect the 20-pin and 4-pin leads of ATX12V power supplies to the
corresponding connectors on the board, otherwise the board will not boot.
• Do not use a standard ATX power supply. The board will not boot with a standard ATX
power supply.
Table 29. ATX12V Power Connector
Pin Signal Name Pin Signal Name
1 Ground 2 Ground
3 +12 V 4 +12 V
Table 30. Processor Fan Connector
Pin Signal Name
1 (Note)
2 +12 V
3 CPU_FAN_TACH
Note: Pin 1 is Control if the Desktop Board uses the hardware monitoring and fan control ASIC.
Pin 1 is Ground if the Desktop Board uses the hardware monitoring ASIC.
Technical Reference
65
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 31. Main Power Connector
Pin Signal Name Pin Signal Name
1 +3.3 V 11 +3.3 V
2 +3.3 V 12 -12 V
3 Ground 13 Ground
4 +5 V 14 PS-ON# (power supply remote on/off)
5 Ground 15 Ground
6 +5 V 16 Ground
7 Ground 17 Ground
8 PWRGD (Power Good) 18 No connect
9 +5 V (Standby) 19 +5 V
10 +12 V 20 +5 V
Table 32. Chassis Intrusion Connector
Pin Signal Name
1 Intruder
2 Ground
Table 33. Front Chassis Fan Connector
Pin Signal Name
1 (Note 1)
2 +12 V
3 (Note 2)
Notes: 1. Pin 1 is Control if the Desktop Board uses the hardware monitoring and fan control ASIC.
Pin 1 is Ground if the Desktop Board uses the hardware monitoring ASIC.
2. Pin 3 is FRONT_TACH_OUT if the Desktop Board uses the hardware monitoring and fan control ASIC.
Pin 3 is No connect if the Desktop Board uses the hardware monitoring ASIC.
66
Technical Reference
2.8.2.3 Add-in Board and Peripheral Interface Connectors
Figure 15 shows the location of the add-in board connector and peripheral connectors for the
Desktop Board D845GEBV2. Note the following considerations for the PCI bus connectors (for
both Desktop Boards):
• All of the PCI bus connectors are bus master capable.
• SMBus signals are routed to PCI bus connector 2. This enables PCI bus add-in boards with
SMBus support to access sensor data on the Desktop Board. The specific SMBus signals are
as follows:
The SMBus clock line is connected to pin A40.
The SMBus data line is connected to pin A41.
A B C D E
G H
F
2
1
1
2
1
K
JL
40
39
2
40
1
39
I
Item Description Item Description
A CNR (optional) G PCI bus connector 1
B PCI bus connector 6 H AGP connector
C PCI bus connector 5 I Diskette drive
D PCI bus connector 4 J Primary IDE
E PCI bus connector 3 K Secondary IDE
F PCI bus connector 2 L SCSI LED
34
33
OM13579
Figure 15. D845GEBV2 Add-in Board and Peripheral Interface Connectors
Figure 16 shows the location of the add-in board connector and peripheral connectors for the
Desktop Board D845GERG2.
67
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
A C EB D
Item Description Item Description
A CNR (optional) F Diskette drive
B PCI bus connector 3 G Primary IDE
C PCI bus connector 2 H Secondary IDE
D PCI bus connector 1 I SCSI LED
E AGP connector
Figure 16. D845GERG2 Add-in Board and Peripheral Interface Connectors
INTEGRATOR’S NOTES
#
• The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy
3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V
AGP cards.
• Not all PCI video cards can be used in PCI bus connectors 1 and 2 (the PCI bus
connectors closest to the processor). To avoid clearance problems, install PCI video
cards in PCI bus connector 3.
2
1
2
1
H
GI
40
39
2
40
1
39
34
33
F
OM15022
Table 34. SCSI LED Connector
Pin Signal Name
1 SCSI_ACT#
2 No connect
68
2.8.3 External I/O Connectors
Figure 17 shows the locations of the external I/O connectors.
2
C
1
7
10
Technical Reference
1
B
A
2
8
9
3
1
OM13580
Item Description For more information see:
A Auxiliary front panel power/sleep/message-waiting LED Table 39
B Front panel Table 36
C Front panel USB Table 35
Figure 17. External I/O Connectors
Table 35. Front Panel USB Connector
Pin Signal Name Pin Signal Name
1 USB_FNT_PWR 2 USB_FNT_PWR
3 USB_FNTA# 4 USB_FNTB#
5 USB_FNTA 6 USB_FNTB
7 Ground 8 Ground
9 Key 10 USB_FP_OC (USB front panel
overcurrent signal)
INTEGRATOR’S NOTE
#
Use only a front panel USB connector that conforms to the USB 2.0 specification for high-speed
USB devices.
69
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.8.3.1 Front Panel Connector
This section describes the functions of the front panel connector. Table 36 lists the signal names
of the front panel connector.
Table 36. Front Panel Connector
Pin Signal In/Out Description Pin Signal In/Out Description
Hard Drive Activity LED Power LED
1 HD_PWR Out Hard disk LED pull-up
(330 Ω) to +5 V
3 HAD# Out Hard disk active LED 4 HDR_BLNK_
Reset Switch On/Off Switch
5 Ground Ground 6 SWITCH_ON# In Power switch
7 FP_RESET# In Reset switch 8 Ground Ground
9 +5 V Out Power 10 N/C Not connected
Hard Drive
Activity LED
2 HDR_BLNK_
GRN
YEL
2
1
Power
4
3
LED
Out Front panel green
LED
Out Front panel yellow
LED
6
Reset
Switch
+5 V DC
5
8
7
9
Power
Switch
N/C
OM14561
2.8.3.1.1 Hard Drive Activity LED Connector
Pins 1 and 3 can be connected to an LED to provide a visual indicator that data is being read from
or written to a hard drive. For the LED to function properly, an IDE drive must be connected to
the onboard IDE interface. The LED will also show activity for devices connected to the SCSI
hard drive activity LED connector.
For information about Refer to
The SCSI hard drive activity LED connector Section 1.8.3.2, page 34
2.8.3.1.2 Reset Switch Connector
Pins 5 and 7 can be connected to a momentary SPST type switch that is normally open. When the
switch is closed, the Desktop Board resets and runs the POST.
70
Technical Reference
2.8.3.1.3 Power/Sleep/Message Waiting LED Connector
Pins 2 and 4 can be connected to a one- or two-color LED. Table 37 shows the possible states for
a one-color LED. Table 38 shows the possible states for a two-color LED.
Table 37. States for a One-Color Power LED
LED State Description
Off Power off/sleeping
Steady Green Running
Blinking Green Running/message waiting
Table 38. States for a Two-Color Power LED
LED State Description
Off Power off
Steady Green Running
Blinking Green Running/message waiting
Steady Yellow Sleeping
Blinking Yellow Sleeping/message waiting
INTEGRATOR’S NOTE
#
To use the message waiting function, ACPI must be enabled in the operating system and a
message-capturing application must be invoked.
2.8.3.1.4 Power Switch Connector
Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The switch must
pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or off.
(The time requirement is due to internal debounce circuitry on the board.) At least two seconds
must pass before the power supply will recognize another on/off signal.
2.8.3.2 Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector
Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector.
Table 39 lists the signal names of the Auxiliary Front Panel Power/Sleep/Message-Waiting LED
Connector.
Table 39. Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector
Pin Signal Name In/Out Description
1 HDR_BLNK_GRN Out Front panel green LED
2 Not connected
3 HDR_BLNK_YEL Out Front panel yellow LED
71
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.9 Jumper Blocks
CAUTION
Do not move any jumpers with the power on. Always turn off the power and unplug the power
cord from the computer before changing a jumper setting. Otherwise, the Desktop Board could be
damaged.
Figure 18 shows the location of the jumper blocks.
A
2
1
10
9
J8A1
B
31
J9H2
OM13581
Item Description Reference Designator
A Front panel audio connector/jumper block J8A1
B BIOS Setup configuration jumper block J9H2
Figure 18. Location of the Jumper Blocks
2.9.1 Front Panel Audio Connector/Jumper Block
This connector has two functions:
• With jumpers installed, the audio line out signals are routed to the back panel audio line out
connector.
• With jumpers removed, the connector provides audio line out and mic in signals for front panel
audio connectors.
72
Technical Reference
Table 40 describes the two configurations of this connector/jumper block.
CAUTION
Do not place jumpers on this block in any configuration other than the one described in Table 40.
Other jumper configurations are not supported and could damage the Desktop Board.
Table 40. Front Panel Audio Connector/Jumper Block
Jumper Setting Configuration
1
34
5
7
9
2
6
10
1
34
5
7
9
2
6
10
1 and 2
3 and 4
5 and 6
9 and 10
No jumpers
installed
Audio line out signals are routed to the back panel audio line out
connector. The back panel audio line out connector is shown in Figure 12
on page 60.
Audio line out and mic in signals are available for front panel audio
connectors. Table 25 on page 64 lists the names of the signals available
on this connector when no jumpers are installed.
INTEGRATOR’S NOTE
#
When the jumpers are removed and this connector is used for front panel audio, the back panel
audio line out and mic in connectors are disabled.
2.9.2 BIOS Setup Configuration Jumper Block
The 3-pin jumper block determines the BIOS Setup program’s mode. Table 41 describes the
jumper settings for the three modes: normal, configure, and recovery. When the jumper is set to
configuration mode and the computer is powered-up, the BIOS compares the processor version and
the microcode version in the BIOS and reports if the two match.
Table 41. BIOS Setup Configuration Jumper Settings
Function/Mode Jumper Setting Configuration
Normal
1-2
Configure
2-3
Recovery
None
The BIOS uses current configuration information and
13
passwords for booting.
After the POST runs, Setup runs automatically. The
13
maintenance menu is displayed.
The BIOS attempts to recover the BIOS configuration. A
13
recovery diskette is required.
73
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.10 Mechanical Considerations
2.10.1 D845GEBV2 Form Factor
The Desktop Board D845GEBV2 is designed to fit into an ATX-form-factor chassis. Figure 19
illustrates the mechanical form factor for the Desktop Board D845GEBV2. Dimensions are given
in inches [millimeters]. The outer dimensions are 12.00 inches by 8.20 inches [304.80 millimeters
by 208.28 millimeters]. Location of the I/O connectors and mounting holes are in compliance with
the ATX specification (see Section 1.5).
.800
[20.32]
6.50
[165.10]
6.10
[154.94]
5.20
[132.08]
0.00
1.700
[42.5]
2.95
[74.93]
2.300
[58.42]
0.00
2.600
[66.04]
Figure 19. Desktop Board D845GEBV2 Dimensions
8.800
[223.52]
9.050
[229.87]
OM13583
74
Technical Reference
2.10.2 D845GERG2 Form Factor
The Desktop Board D845GERG2 is designed to fit into either a microATX or an ATX-form-factor
chassis. Figure 20 illustrates the mechanical form factor for the Desktop Board D845GERG2.
Dimensions are given in inches [millimeters]. The outer dimensions are 9.60 inches by
8.20 inches [243.84 millimeters by 208.28 millimeters]. Location of the I/O connectors and
mounting holes are in compliance with the ATX specification (see Section 1.5).
NOTE
✏
When installing the Desktop Board in a microATX chassis, make sure that peripheral devices are
installed at least 1.5 inches above the main power connector, the diskette drive connector, and the
IDE connector, and the DIMM sockets.
.800
[20.32]
6.50
[165.10]
6.10
[154.94]
5.20
[132.08]
0.00
1.700
[42.5]
.550
[13.97]
2.600
0.00
Figure 20. Desktop Board D845GERG2 Dimensions
[66.04]
75
8.800
[223.52]
9.050
[229.87]
OM15023
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.10.3 I/O Shield
The back panel I/O shield for the Desktop Boards D845GEBV2 and D845GERG2 must meet
specific dimension and material requirements. Systems based on these Desktop Boards need the
back panel I/O shield to pass certification testing. Figure 21 shows the I/O shield for Desktop
Boards with the onboard LAN subsystem. Figure 22 shows the I/O shield for Desktop Boards
without the onboard LAN subsystem. Dimensions are given in inches to a tolerance of ±0.02
inches.
The figures also indicate the position of each cutout. Additional design considerations for I/O
shields relative to chassis requirements are described in the ATX specification. See Section 1.5 for
information about the ATX specification.
NOTE
✏
The I/O shield drawings in this document are for reference only. An I/O shield compliant with the
ATX chassis specification 2.03 is available from Intel.
REF
6.390
[162.300]
0.063 0.005
[1.600 0.120]
0.884
[22.450]
0.276
[7.012]
0.000
[0.000]
0.465
[11.811]
0.567
[14.400]
3x Dia 0.039 [1.000]
0.000
[0.000]
0.447
1.195
[11.345]
0.787 0.010 TYP [20 0.254]
[30.360]
1.807
[45.892]
2.081
[52.854]
3.219
[81.768]
3x Dia 0.330 [8.380]
4.840
[122.950]
5.771
Pictorial
[146.577]
View
8X R0.5 MIN
A
0.519
[13.190]
0.027
[0.690]
0.465
[11.810]
0.472
[12.000]
76
OM11487
Figure 21. I/O Shield Dimensions (for Desktop Boards with the LAN Subsystem)
REF
6.390
[162.300]
0.787 0.010 TYP [20 0.254]
Technical Reference
0.063 0.005
[1.600 0.120]
0.884
[22.450]
0.276
[7.012]
0.000
[0.000]
0.465
[11.811]
0.567
[14.400]
3x Dia 0.039 [1.000]
0.000
[0.000]
0.447
1.195
[11.345]
[30.360]
1.807
[45.892]
2.081
[52.854]
3.219
[81.768]
3x Dia 0.330 [8.380]
4.840
[122.950]
5.771
Pictorial
[146.577]
View
8X R0.5 MIN
A
0.519
[13.190]
0.027
[0.690]
0.465
[11.810]
0.472
[12.000]
OM15024
Figure 22. I/O Shield Dimensions (for Desktop Boards with no LAN Subsystem)
77
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.11 Electrical Considerations
2.11.1 Power Consumption
Table 42 lists voltage and current measurements for a computer that contains the Desktop Board
D845GEBV2/D845GERG2 and the following:
• 2.80 GHz Intel Pentium 4 processor with a 512 KB cache
• 64 MB AGP add-in card
• 256 MB DDR 333 SDRAM
• 3.5-inch diskette drive
• 10 GB IDE hard disk drive
• 6.2 X IDE CD-ROM/32 X CD-ROM drive
This information is provided only as a guide for calculating approximate power usage with
additional resources added.
Values for the Windows XP desktop mode are measured at 640 x 480 x 256 colors and 60 Hz
refresh rate. AC watts are measured with the computer is connected to a typical 300 W power
supply, at nominal input voltage and frequency, with a true RMS wattmeter at the line input.
✏ NOTE
Actual system power consumption depends upon system configuration. The power supply should
comply with the recommendations found in the ATX/ATX12V Power Supply Design Guide,
Version 1.1 (see Section 1.5 on page 20 for specification information).
Table 42. Power Usage
DC Current at:
Mode AC Power +3.3 V +5 V +12 V -12 V +5 VSB
ACPI S0 163.0 W 5.68 A 1.52 A 7.24 A 67 mA 396 mA
ACPI S1 93.0 W 4.04 A 0.51 A 2.75 A 38 mA 152 mA
ACPI S3 3.6 W 0 A 0 mA 0 A 0 mA 370 mA
ACPI S5 3.1 W 0 A 0 mA 0 A 0 mA 290 mA
2.11.2 Add-in Board Considerations
The Desktop Boards D845GEBV2 and D845GERG2 are designed to provide 2 A (average) of
+5 V current for each add-in board. The total +5 V current draw for add-in boards is as follows:
• For a fully loaded Desktop Board D845GEBV2 (all seven expansion slots filled), the total
+5 V current draw must not exceed 14 A.
• For a fully loaded Desktop Board D845GERG2 (all four expansion slots filled), the total +5 V
current draw must not exceed 8 A.
78
Technical Reference
2.11.3 Standby Current Requirements
CAUTION
If the standby current necessary to support multiple wake events from the PCI and/or USB buses
exceeds power supply capacity, the Desktop Boards D845GEBV2 and D845GERG2 may lose
register settings stored in memory, etc. Calculate the standby current requirements using the steps
described below.
Power supplies used with the Desktop Boards D845GEBV2 and D845GERG2 must be able to
provide enough standby current to support the Instantly Available PC (ACPI S3 sleep state)
configuration as outlined in Table 43 below.
Values are determined by specifications such as PCI 2.2. Actual measured values may vary.
To estimate the amount of standby current required for a particular system configuration, standby
current requirements of all installed components must be added to determine the total standby
current requirement. Refer to the descriptions in Table 43 and review the following steps.
1. Note the total Desktop Board D845GEBV2 or D845GERG2 standby current requirement.
2. Add to that the total PS/2 port standby current requirement if a wake-enabled device is
connected.
3. Add, from the PCI 2.2 slots (wake enabled) row, the total number of wake-enabled devices
installed (PCI and AGP) and multiply by the standby current requirement.
4. Add, from the PCI 2.2 slots (nonwake enabled) row, the total number of wake-enabled devices
installed (PCI and AGP) and multiply by the standby current requirement.
5. Add all additional wake-enabled devices’ and nonwake-enabled devices’ standby current
requirements as applicable.
6. Add all the required current totals from steps 1 through 5 to determine the total estimated
standby current power supply requirement.
Table 43. Standby Current Requirements
Instantly Available PC Current
Support (Estimated for
Integrated Board Components)
Instantly Available PC Stand-by
Current Support
• Estimated for add-on
components
• Add to Instantly Available
PC total current
requirement
(See instructions above)
Note: Dependent upon system configuration
Description
Total for Desktop Board
D845GEBV2/D845GERG2
PS/2 ports
PCI 2.2 slots (wake enabled) 375
PCI 2.2 slots (nonwake enabled) 20
CNR (Note) 375
USB ports
Standby Current
Requirements (mA)
370
(Note)
345
(Note)
500
79
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
NOTE
✏
IBM PS/2 Port Specification (Sept 1991) states:
• 275 mA for keyboard
• 70 mA for the mouse (nonwake-enable device)
PCI/AGP requirements are calculated by totaling the following:
• One wake-enabled device @ 375 mA, plus
• Five nonwake-enabled devices @ 20 mA each, plus
USB requirements are calculated as:
• One wake-enabled device @ 500 mA
• USB hub @ 100 mA
• Three USB nonwake-enabled devices connected @ 2.5 mA each
NOTE
✏
Both USB ports are capable of providing up to 500 mA during normal G0/S0 operation. Only one
USB port will support up to 500 mA of stand-by-current (wake-enabled device) during G1/S3
suspended operation. The other port may provide up to 7.5 mA (three nonwake-enabled devices.)
during G1/S3 suspended operation.
2.11.4 Fan Connector Current Capability
Table 44 lists the current capability of the fan connectors on the Desktop Boards D845GEBV2 and
D845GERG2.
Table 44. Fan Connector Current Capability
Maximum Available Current for Desktop Boards with the:
Fan Connector
Processor fan 1.00 A 0.80 A
Front chassis fan 0.50 A 0.30 A
Rear chassis fan 0.35 A 0.30 A
Hardware Monitoring ASIC
Hardware Monitoring and
Fan Control ASIC
80
Technical Reference
2.11.5 Power Supply Considerations
CAUTION
The +5 V standby line for the power supply must be capable of providing adequate +5 V standby
current. Failure to do so can damage the power supply. The total amount of standby current
required depends on the wake devices supported and manufacturing options. Refer to
Section 2.11.3 on page 78 for additional information.
System integrators should refer to the power usage values listed in Table 42 when selecting a
power supply for use with the Desktop Board D845GEBV2 or D845GERG2.
Measurements account only for current sourced by the Desktop Board D845GEBV2 or
D845GERG2 while running in idle modes of the started operating systems.
Additional power required will depend on configurations chosen by the integrator.
The power supply must comply with the following recommendations found in the indicated
sections of the ATX form factor specification.
• The potential relation between 3.3 VDC and +5 VDC power rails (Section 4.2)
• The current capability of the +5 VSB line (Section 4.2.1.2)
• All timing parameters (Section 4.2.1.3)
• All voltage tolerances (Section 4.2.2)
For information about Refer to
The ATX form factor specification
Section 1.5, page 20
2.12 Thermal Considerations
CAUTION
The use of an Intel Pentium 4 processor operating above 2.80 GHz with this Intel desktop board
requires the following:
• A chassis with appropriate airflow to ensure proper cooling of the components on the board
• A processor fan heatsink that meets the thermal performance targets for Pentium 4 processors
operating above 2.80 GHz
Failure to ensure appropriate airflow may result in reduced performance of both the processor
and/or voltage regulator or, in some instances, damage to the desktop board. For a list of chassis
that have been tested with Intel desktop boards please refer to the following website:
http://developer.intel.com/design/motherbd/cooling.htm
All responsibility for determining the adequacy of any thermal or system design remains solely
with the reader. Intel makes no warranties or representations that merely following the
instructions presented in this document will result in a system with adequate thermal performance.
81
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
CAUTION
Ensure that the ambient temperature does not exceed the Desktop Board’s maximum operating
temperature. Failure to do so could cause components to exceed their maximum case temperature
and malfunction. For information about the maximum operating temperature, see the
environmental specifications in Section 2.14.
CAUTION
Ensure that proper airflow is maintained in the processor voltage regulator circuit. Failure to do
so may result in damage to the voltage regulator circuit. The processor voltage regulator area
(item A in Figure 23) can reach a temperature of up to 85
Figure 23 shows the locations of the localized high temperature zones.
o
C in an open chassis.
A
B
OM13584
C
D
A Processor voltage regulator area
B Processor
C Intel 82845GE GMCH
D Intel 82801DB ICH4
Figure 23. Localized High Temperature Zones
82
Technical Reference
Table 45 provides maximum case temperatures for the Desktop Board D845GEBV2/D845GERG2
components that are sensitive to thermal changes. The operating temperature, current load, or
operating frequency could affect case temperatures. Maximum case temperatures are important
when considering proper airflow to cool the Desktop Board D845GEBV2/D845GERG2.
Table 45. Thermal Considerations for Components
Component Maximum Case Temperature
Intel Pentium 4 processor For processor case temperature, see processor datasheets and
processor specification updates
Intel 82845GE GMCH 83 oC (under bias)
Intel 82801DB ICH4 110 oC (under bias)
For information about Refer to
Intel Pentium 4 processor datasheets and specification updates Section 1.3, page 19
83
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.13 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Bellcore Reliability Prediction
Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF prediction is used to estimate
repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 55 ºC. The MTBF calculations for the
Desktop Boards are as follows:
• Desktop Board D845GEBV2 MTBF: 108748 hours
• Desktop Board D845GERG2 MTBF: 111270 hours
2.14 Environmental
Table 46 lists the environmental specifications for the Desktop Boards D845GEBV2 and
D845GERG2.
Table 46. Desktop Board D845GEBV2/D845GERG2 Environmental Specifications
Parameter Specification
Temperature
Non-Operating -40 °C to +70 °C
Operating 0 °C to +55 °C
Shock
Unpackaged 50 g trapezoidal waveform
Velocity change of 170 inches/second
Packaged Half sine 2 millisecond
Product Weight (pounds) Free Fall (inches) Velocity Change (inches/sec)
<20 36 167
21-40 30 152
41-80 24 136
81-100 18 118
Vibration
Unpackaged 5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz: 0.02 g² Hz (flat)
Packaged 10 Hz to 40 Hz: 0.015 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz
84
Technical Reference
2.15 Regulatory Compliance
This section describes the Desktop Boards’ compliance with U.S. and international safety and
electromagnetic compatibility (EMC) regulations.
2.15.1 Safety Regulations
Table 47 lists the safety regulations the Desktop Boards D845GEBV2 and D845GERG2 comply
with when correctly installed in a compatible host system.
Table 47. Safety Regulations
Regulation Title
CSA C22.2 No. 60950/
UL 60950, 3
EN 60950, 2nd Edition, 1992
(with Amendments 1, 2, 3, and 4)
IEC 60950, 2nd Edition, 1991
(with Amendments 1, 2, 3, and 4)
EMKO-TSE (74-SEC) 207/94 Summary of Nordic deviations to EN 60950. (Norway, Sweden,
rd
Edition, 2000
Bi-National Standard for Safety of Information Technology Equipment
including Electrical Business Equipment. (USA and Canada)
The Standard for Safety of Information Technology Equipment including
Electrical Business Equipment. (European Union)
The Standard for Safety of Information Technology Equipment including
Electrical Business Equipment. (International)
Denmark, and Finland)
2.15.2 EMC Regulations
Table 48 lists the EMC regulations the Desktop Boards D845GEBV2 and D845GERG2 comply
with when correctly installed in a compatible host system.
Table 48. EMC Regulations
Regulation Title
FCC (Class B) Title 47 of the Code of Federal Regulations, Parts 2 and 15, Subpart B,
Radio Frequency devices. (USA)
ICES-003 (Class B) Interference-Causing Equipment Standard, Digital Apparatus. (Canada)
EN55022: 1998 (Class B) Limits and methods of measurement of Radio Interference
Characteristics of Information Technology Equipment. (European
Union)
EN55024: 1998 Information Technology Equipment – Immunity Characteristics Limits
and methods of measurement. (European Union)
AS/NZS 3548 (Class B) Australian Communications Authority, Standard for Electromagnetic
Compatibility. (Australia and New Zealand)
CISPR 22, 3rd Edition (Class B) Limits and methods of measurement of Radio Disturbance
Characteristics of Information Technology Equipment. (International)
CISPR 24: 1997 Information Technology Equipment – Immunity Characteristics – Limits
and Methods of Measurements. (International)
85
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.15.3 Product Certification Markings (Board Level)
The Desktop Boards D845GEBV2 and D845GERG2 have the following product certification
markings:
• UL joint US/Canada Recognized Component mark: Consists of lower case c followed by a
stylized backward UR and followed by a small US. Includes adjacent UL file number for Intel
Desktop Boards: E210882 (component side).
• FCC Declaration of Conformity logo mark for Class B equipment; to include Intel name and
D845GEBV2 and D845GERG2 model designation (solder side).
• CE mark: Declaring compliance to European Union (EU) EMC directive (89/336/EEC) and
Low Voltage directive (73/23/EEC) (component side). The CE mark should also be on the
shipping container.
• Australian Communications Authority (ACA) C-Tick mark: consists of a stylized C overlaid
with a check (tick) mark (component side), followed by Intel supplier code number, N-232.
The C-tick mark should also be on the shipping container.
• Korean EMC certification logo mark: consists of MIC lettering within a stylized elliptical
outline.
• Printed wiring board manufacturer’s recognition mark: consists of a unique UL recognized
manufacturer’s logo, along with a flammability rating (94V-0) (solder side).
• PB part number: Intel bare circuit board part number (solder side). Also includes SKU
number starting with AA followed by additional alphanumeric characters.
For the Desktop Board D845GEBV2, the PB number A97500-00x.
For the Desktop Board D845GERG2, the PB number is A97503-00x.
• Battery “+ Side Up” marking: located on the component side of the Desktop Board in close
proximity to the battery holder.
86
3 Overview of BIOS Features
What This Chapter Contains
3.1 Introduction.................................................................................................................87
3.2 BIOS Flash Memory Organization ..............................................................................87
3.3 Resource Configuration..............................................................................................88
3.4 System Management BIOS (SMBIOS).......................................................................89
3.5 Legacy USB Support ..................................................................................................89
3.6 BIOS Updates ............................................................................................................90
3.7 Recovering BIOS Data ...............................................................................................91
3.8 Boot Options...............................................................................................................92
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot ....................................................93
3.10 BIOS Security Features..............................................................................................94
3.1 Introduction
The Desktop Boards D845GEBV2 and D845GERG2 use an Intel/AMI BIOS that is stored in the
Firmware Hub (FWH) and can be updated using a disk-based program. The FWH contains the
BIOS Setup program, POST, the PCI auto-configuration utility, and Plug and Play support.
The BIOS displays a message during POST identifying the type of BIOS and a revision code. The
initial production BIOSs are identified as RG84510A.86A.
When the Desktop Board’s jumper is set to configuration mode and the computer is powered-up,
the BIOS compares the CPU version and the microcode version in the BIOS and reports if the two
match.
For information about Refer to
The Desktop Boards’ compliance level with Plug and Play Section 1.5, page 20
3.2 BIOS Flash Memory Organization
The Firmware Hub (FWH) includes a 4 Mbit (512 KB) symmetrical flash memory device.
Internally, the device is grouped into eight 64-KB blocks that are individually erasable, lockable,
and unlockable.
87
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
3.3 Resource Configuration
3.3.1 PCI Autoconfiguration
The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards.
Autoconfiguration lets a user insert or remove PCI cards without having to configure the system.
When a user turns on the system after adding a PCI card, the BIOS automatically configures
interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are
considered to be available for use by the add-in card. Autoconfiguration information is stored in
ESCD format.
For information about the versions of PCI and Plug and Play supported by the BIOS, see
Section 1.5.
3.3.2 PCI IDE Support
If you select Auto in the BIOS Setup program, the BIOS automatically sets up the two
PCI IDE connectors with independent I/O channel support. The IDE interface supports hard drives
up to ATA-66/100 and recognizes any ATAPI compliant devices, including CD-ROM drives, tape
drives, and Ultra DMA drives (see Section 1.5 for the supported version of ATAPI). The BIOS
determines the capabilities of each drive and configures them to optimize capacity and
performance. To take advantage of the high capacities typically available today, hard drives are
automatically configured for Logical Block Addressing (LBA) and to PIO Mode 3 or 4, depending
on the capability of the drive. You can override the auto-configuration options by specifying
manual configuration in the BIOS Setup program.
To use ATA-66/100 features the following items are required:
• An ATA-66/100 peripheral device
• An ATA-66/100 compatible cable
• ATA-66/100 operating system device drivers
NOTE
✏
ATA-66/100 compatible cables are backward compatible with drives using slower IDE transfer
protocols. If an ATA-66/100 disk drive and a disk drive using any other IDE transfer protocol are
attached to the same cable, the maximum transfer rate between the drives is reduced to that of the
slowest device.
NOTE
✏
Do not connect an ATA device as a slave on the same IDE cable as an ATAPI master device. For
example, do not connect an ATA hard drive as a slave to an ATAPI CD-ROM drive.
88
Overview of BIOS Features
3.4 System Management BIOS (SMBIOS)
SMBIOS is a Desktop Management Interface (DMI) compliant method for managing computers in
a managed network.
The main component of SMBIOS is the Management Information Format (MIF) database, which
contains information about the computing system and its components. Using SMBIOS, a system
administrator can obtain the system types, capabilities, operational status, and installation dates for
system components. The MIF database defines the data and provides the method for accessing this
information. The BIOS enables applications such as third-party management software to use
SMBIOS. The BIOS stores and reports the following SMBIOS information:
• BIOS data, such as the BIOS revision level
• Fixed-system data, such as peripherals, serial numbers, and asset tags
• Resource data, such as memory size, cache size, and processor speed
• Dynamic data, such as event detection and error logging
Non-Plug and Play operating systems, such as Windows NT, require an additional interface for
obtaining the SMBIOS information. The BIOS supports an SMBIOS table interface for such
operating systems. Using this support, an SMBIOS service-level application running on a
non-Plug and Play operating system can obtain the SMBIOS information.
For information about Refer to
The Desktop Boards’ compliance level with SMBIOS Section 1.5, page 20
3.5 Legacy USB Support
Legacy USB support enables USB devices such as keyboards, mice, and hubs to be used even
when the operating system’s USB drivers are not yet available. Legacy USB support is used to
access the BIOS Setup program, and to install an operating system that supports USB. By default,
Legacy USB support is set to Enabled.
Legacy USB support operates as follows:
1. When you apply power to the computer, legacy support is disabled.
2. POST begins.
3. Legacy USB support is enabled by the BIOS allowing you to use a USB keyboard to enter and
configure the BIOS Setup program and the maintenance menu.
4. POST completes.
5. The operating system loads. While the operating system is loading, USB keyboards and mice
are recognized and may be used to configure the operating system. (Keyboards and mice are
not recognized during this period if Legacy USB support was set to Disabled in the BIOS
Setup program.)
6. After the operating system loads the USB drivers, all legacy and non-legacy USB devices are
recognized by the operating system, and Legacy USB support from the BIOS is no longer
used.
89
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
To install an operating system that supports USB, verify that Legacy USB support in the BIOS
Setup program is set to Enabled and follow the operating system’s installation instructions.
NOTE
✏
Legacy USB support is for keyboards, mice, and hubs only. Other USB devices are not supported
in legacy mode.
3.6 BIOS Updates
The BIOS can be updated using either of the following utilities, which are available on the Intel
World Wide Web site:
®
• Intel
• Intel
Express BIOS Update utility, which enables automated updating while in the Windows
environment. Using this utility, the BIOS can be updated from a file on a hard disk, a 1.44 MB
diskette, or a CD-ROM, or from the file location on the Web.
®
Flash Memory Update Utility, which requires creation of a boot diskette and manual
rebooting of the system. Using this utility, the BIOS can be updated from a file on a 1.44 MB
diskette (from a legacy diskette drive or an LS-120 diskette drive) or a CD-ROM.
Both utilities support the following BIOS maintenance functions:
• Verifying that the updated BIOS matches the target system to prevent accidentally installing
an incompatible BIOS.
• Updating both the BIOS boot block and the main BIOS. This process is fault tolerant to
prevent boot block corruption.
• Updating the BIOS boot block separately.
• Changing the language section of the BIOS.
• Updating replaceable BIOS modules, such as the video BIOS module.
• Inserting a custom splash screen.
NOTE
✏
Review the instructions distributed with the upgrade utility before attempting a BIOS update.
For information about Refer to
The Intel World Wide Web site Section 1.3, page 19
3.6.1 Language Support
The BIOS Setup program and help messages are supported in five languages: US English,
German, Italian, French, and Spanish. The default language is US English, which is present unless
another language is selected in the BIOS Setup program.
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Overview of BIOS Features
3.6.2 Custom Splash Screen
During POST, an Intel splash screen is displayed by default. This splash screen can be replaced
with a custom splash screen. A utility is available from Intel to assist with creating a custom
splash screen. The custom splash screen can be programmed into the flash memory using the
BIOS upgrade utility. Information about this capability is available on the Intel Support World
Wide Web site.
For information about Refer to
The Intel World Wide Web site Section 1.3, page 19
3.7 Recovering BIOS Data
Some types of failure can destroy the BIOS. For example, the data can be lost if a power outage
occurs while the BIOS is being updated in flash memory. The BIOS can be recovered from a
diskette using the BIOS recovery mode. When recovering the BIOS, be aware of the following:
• Because of the small amount of code available in the non-erasable boot block area, there is no
video support. You can only monitor this procedure by listening to the speaker or looking at
the diskette drive LED.
• The recovery process may take several minutes; larger BIOS flash memory devices require
more time.
• Two beeps and the end of activity in the diskette drive indicate successful BIOS recovery.
• A series of continuous beeps indicates a failed BIOS recovery.
To create a BIOS recovery diskette, a bootable diskette must be created and the BIOS update files
copied to it. BIOS upgrades and the Intel Flash Memory Update Utility are available from Intel
Customer Support through the Intel World Wide Web site.
NOTE
✏
Even if the computer is configured to boot from an LS-120 diskette (in the Setup program’s
Removable Devices submenu), the BIOS recovery diskette must be a standard 1.44 MB diskette not
a 120 MB diskette.
For information about Refer to
The BIOS recovery mode jumper settings Section 2.9.2, page 73
The Boot menu in the BIOS Setup program Section 4.7, page 115
Contacting Intel customer support Section 1.3, page 19
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
3.8 Boot Options
In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives,
CD-ROM, or the network. The default setting is for the diskette drive to be the first boot device,
the hard drive second, and the ATAPI CD-ROM third. The fourth device is disabled.
3.8.1 CD-ROM Boot
Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM format
specification. Under the Boot menu in the BIOS Setup program, ATAPI CD-ROM is listed as a
boot device. Boot devices are defined in priority order. Accordingly, if there is not a bootable CD
in the CD-ROM drive, the system will attempt to boot from the next defined drive.
For information about Refer to
The El Torito specification Section 1.5, page 20
3.8.2 Network Boot
The network can be selected as a boot device. This selection allows booting from the onboard
LAN or a network add-in card with a remote boot ROM installed.
Pressing the <F12> key during POST automatically forces boot from the LAN.
3.8.3 Booting Without Attached Devices
For use in embedded applications, the BIOS has been designed so that after passing the POST, the
operating system loader is invoked even if the following devices are not present:
• Video adapter
• Keyboard
• Mouse
3.8.4 Changing the Default Boot Device During POST
Pressing the <F10> key during POST causes a boot device menu to be displayed. This menu
displays the list of available boot devices (as set in the BIOS setup program’s Boot Device Priority
Submenu). Table 49 lists the boot device menu options.
Table 49. Boot Device Menu Options
Boot Device Menu Function Keys Description
<↑> or <↓> Selects a default boot device
<Enter> Exits the menu, saves changes, and boots from the selected device
<Esc> Exits the menu without saving changes
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Overview of BIOS Features
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot
These factors affect system boot speed:
• Selecting and configuring peripherals properly
®
• Using an optimized BIOS, such as the Intel Rapid
3.9.1 Peripheral Selection and Configuration
The following techniques help improve system boot speed:
• Choose a hard drive with parameters such as “power-up to data ready” less than eight seconds,
that minimize hard drive startup delays.
• Select a CD-ROM drive with a fast initialization rate. This rate can influence POST
execution time.
• Eliminate unnecessary add-in adapter features, such as logo displays, screen repaints, or mode
changes in POST. These features may add time to the boot process.
• Try different monitors. Some monitors initialize and communicate with the BIOS more
quickly, which enables the system to boot more quickly.
BIOS
3.9.2 Intel Rapid BIOS Boot
Use of the following BIOS Setup program settings reduces the POST execution time.
In the Boot Menu:
• Set the hard disk drive as the first boot device. As a result, the POST does not first seek a
diskette drive, which saves about one second from the POST execution time.
• Disable Quiet Boot, which eliminates display of the logo splash screen. This could save
several seconds of painting complex graphic images and changing video modes.
• Enabled Intel Rapid BIOS Boot. This feature bypasses memory count and the search for a
diskette drive.
In the Peripheral Configuration submenu, disable the LAN device if it will not be used. This can
reduce up to four seconds of option ROM boot time.
NOTE
✏
It is possible to optimize the boot process to the point where the system boots so quickly that the
Intel logo screen (or a custom logo splash screen) will not be seen. Monitors and hard disk drives
with minimum initialization times can also contribute to a boot time that might be so fast that
necessary logo screens and POST messages cannot be seen.
This boot time may be so fast that some drives might be not be initialized at all. If this condition
should occur, it is possible to introduce a programmable delay ranging from three to 30 seconds
(using the Hard Disk Pre-Delay feature of the Advanced Menu in the IDE Configuration Submenu
of the BIOS Setup program).
For information about Refer to
IDE Configuration Submenu in the BIOS Setup program Section 4.4.4, page 103
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
3.10 BIOS Security Features
The BIOS includes security features that restrict access to the BIOS Setup program and who can
boot the computer. A supervisor password and a user password can be set for the BIOS Setup
program and for booting the computer, with the following restrictions:
• The supervisor password gives unrestricted access to view and change all the Setup options in
the BIOS Setup program. This is the supervisor mode.
• The user password gives restricted access to view and change Setup options in the BIOS Setup
program. This is the user mode.
• If only the supervisor password is set, pressing the <Enter> key at the password prompt of the
BIOS Setup program allows the user restricted access to Setup.
• If both the supervisor and user passwords are set, users can enter either the supervisor
password or the user password to access Setup. Users have access to Setup respective to
which password is entered.
• Setting the user password restricts who can boot the computer. The password prompt will be
displayed before the computer is booted. If only the supervisor password is set, the computer
boots without asking for a password. If both passwords are set, the user can enter either
password to boot the computer.
Table 50 shows the effects of setting the supervisor password and user password. This table is for
reference only and is not displayed on the screen.
Table 50. Supervisor and User Password Functions
Password Set
Neither Can change all
Supervisor
only
User only N/A Can change all
Supervisor
and user set
Note: If no password is set, any user can change all Setup options.
Supervisor
Mode
options
Can change all
options
Can change all
options
(Note)
User Mode Setup Options
Can change all
options
Can change a
limited number
of options
options
Can change a
limited number
of options
(Note)
None None None
Supervisor Password Supervisor None
Enter Password
Clear User Password
Supervisor Password
Enter Password
Password to
Enter Setup
User User
Supervisor or
user
Password
During Boot
Supervisor or
user
For information about Refer to
Setting user and supervisor passwords Section 4.4.10, page 112
94
4 BIOS Setup Program
What This Chapter Contains
4.1 Introduction.................................................................................................................95
4.2 Maintenance Menu.....................................................................................................96
4.3 Main Menu..................................................................................................................97
4.4 Advanced Menu..........................................................................................................98
4.5 Security Menu ..........................................................................................................113
4.6 Power Menu .............................................................................................................114
4.7 Boot Menu................................................................................................................115
4.8 Exit Menu .................................................................................................................118
4.1 Introduction
The BIOS Setup program can be used to view and change the BIOS settings for the computer. The
BIOS Setup program is accessed by pressing the <F2> key after the Power-On Self-Test (POST)
memory test begins and before the operating system boot begins. The menu bar is shown below.
Maintenance Main Advanced Security Power Boot Exit
Table 51 lists the BIOS Setup program menu features.
Table 51. BIOS Setup Program Menu Bar
Maintenance Main Advanced Security Power Boot Exit
Clears
passwords and
BIS credentials
and enables
extended
configuration
mode
Allocates
resources for
hardware
components
Configures
advanced
features
available
through the
chipset
Sets
passwords
and security
features
Configures
power
management
features
Selects boot
options and
power supply
controls
For information about Refer to
Boot Integrity Services (BIS) Section 1.5, page 20
Saves or
discards
changes to
Setup
program
options
NOTE
✏
In this chapter, all examples of the BIOS Setup program menu bar include the maintenance menu;
however, the maintenance menu is displayed only when the Desktop Board is in configuration
mode. Section 2.9.2 on page 73 tells how to put the Desktop Board in configuration mode.
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 52 lists the function keys available for menu screens.
Table 52. BIOS Setup Program Function Keys
BIOS Setup Program Function Key Description
<←> or <→> Selects a different menu screen (Moves the cursor left or right)
<↑> or <↓> Selects an item (Moves the cursor up or down)
<Tab> Selects a field (Not implemented)
<Enter> Executes command or selects the submenu
<F9> Load the default configuration values for the current menu
<F10> Save the current values and exits the BIOS Setup program
<Esc> Exits the menu
4.2 Maintenance Menu
To access this menu, select Maintenance on the menu bar at the top of the screen.
Maintenance
The menu shown in Table 53 is for clearing Setup passwords and enabling extended configuration
mode. Setup only displays this menu in configuration mode. See Section 2.9.2 on page 73 for
configuration mode setting information.
Main Advanced Security Power Boot Exit
Table 53. Maintenance Menu
Feature Options Description
Clear All Passwords • Ok (default)
• Cancel
Clear BIS Credentials • Ok (default)
• Cancel
CPU Stepping
Signature
CPU Microcode
Update Revision
No options Displays CPU’s Stepping Signature.
No options Displays CPU’s Microcode Update Revision.
Clears the user and supervisor passwords.
Clears the Wired for Management Boot Integrity Service (BIS)
credentials.
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BIOS Setup Program
4.3 Main Menu
To access this menu, select Main on the menu bar at the top of the screen.
Maintenance
Main
Table 54 describes the Main menu. This menu reports processor and memory information and is
for configuring the system date and system time.
Table 54. Main Menu
Feature Options Description
BIOS Version No options Displays the version of the BIOS.
Processor Type No options Displays processor type.
Hyper-Threading
Technology
Processor Speed No options Displays processor speed.
System Bus Speed No options Displays the system bus speed.
System Memory
Speed
Cache RAM No options Displays the size of second-level cache.
Total Memory No options Displays the total amount of RAM.
Memory Bank 0
Memory Bank 1
Language • English (default)
System Time Hour, minute, and
System Date Day of week
• Disabled
• Enabled (default)
No options Displays the system memory speed.
No options Displays the amount and type of RAM in the memory
• Francais
second
Month/day/year
Advanced Security Power Boot Exit
Disables/enables Hyper-Threading Technology. This
option is present only when a processor that supports
Hyper-Threading Technology is installed.
banks.
Selects the current default language used by the BIOS.
Specifies the current time.
Specifies the current date.
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.4 Advanced Menu
To access this menu, select Advanced on the menu bar at the top of the screen.
Maintenance Main
Advanced
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
Table 55 describes the Advanced Menu. This menu is used for setting advanced features that are
available through the chipset.
Security Power Boot Exit
Table 55. Advanced Menu
Feature Options Description
PCI Configuration Select to display
submenu
Boot Configuration Select to display
submenu
Peripheral Configuration Select to display
submenu
IDE Configuration Select to display
submenu
Diskette Configuration Select to display
submenu
Event Log Configuration Select to display
submenu
Video Configuration Select to display
submenu
USB Configuration Select to display
submenu
Chipset Configuration Select to display
submenu
Fan Control Configuration Select to display
submenu
Configures individual PCI slot’s IRQ priority.
Configures Plug and Play and the Numlock key, and resets
configuration data.
Configures peripheral ports and devices.
Specifies type of connected IDE devices.
Configures the diskette drive.
Configures Event Logging.
Configures video features.
Configures USB support.
Configures advanced chipset features.
Configures fan control options.
98
BIOS Setup Program
4.4.1 PCI Configuration Submenu
To access this submenu, select Advanced on the menu bar and then PCI Configuration.
Maintenance Main
Advanced
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu shown in Table 56 is used to configure the IRQ priority of PCI slots individually.
Table 56. PCI Configuration Submenu
Security Power Boot Exit
Feature Options Description
PCI Slot1 IRQ Priority
(Note 1)
PCI Slot2 IRQ Priority
(Note 1)
PCI Slot3 IRQ Priority
(Note 1)
PCI Slot4 IRQ Priority
(Note 1, Note 2)
• Auto (default)
• 5
• 9
• 10
• 11
• Auto (default)
• 5
• 9
• 10
• 11
• Auto (default)
• 5
• 9
• 10
• 11
• Auto (default)
• 5
• 9
• 10
• 11
Allows selection of IRQ priority for PCI bus connector 1.
Allows selection of IRQ priority for PCI bus connector 2.
Allows selection of IRQ priority for PCI bus connector 3.
Allows selection of IRQ priority for PCI bus connector 4.
continued
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 56. PCI Configuration Submenu (continued)
Feature Options Description
PCI Slot5 IRQ Priority
(Note 1, Note 2)
PCI Slot6 IRQ Priority
(Note 1, Note 2)
Notes
1. Additional interrupts may be available if certain onboard devices (such as the serial and parallel ports) are disabled.
2. This option appears only on the Desktop Board D845GEBV2.
• Auto (default)
• 5
• 9
• 10
• 11
• Auto (default)
• 5
• 9
• 10
• 11
Allows selection of IRQ priority for PCI bus connector 5.
Allows selection of IRQ priority for PCI bus connector 6.
4.4.2 Boot Configuration Submenu
To access this submenu, select Advanced on the menu bar and then Boot Configuration.
Maintenance Main
Advanced
Security Power Boot Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented by Table 57 is for setting Plug and Play options, resetting configuration
data, and the power-on state of the Numlock key.
Table 57. Boot Configuration Submenu
Feature Options Description
Plug & Play O/S • No (default)
• Yes
Numlock • Off
• On (default)
Specifies if manual configuration is desired.
No lets the BIOS configure all devices. This setting is
appropriate when using a Plug and Play operating system.
Yes lets the operating system configure Plug and Play
devices not required to boot the system. This option is
available for use during lab testing.
Specifies the power-on state of the Numlock feature on the
numeric keypad of the keyboard.
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