Intel S975XBX2 - Workstation Board Motherboard Specification
Intel® Workstation Board
S975XBX2
Technical Product Specification
The Intel® Workstation Board S975XBX2 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 Workstation Board S975XBX2 Specification Update.
October 2006
Order Number: D80929-001
Revision History
Revision Revision History Date
-001 First release of the Intel® Workstation Board S975XBX2 Technical Product
Specification
This product specification applies to only the standard Intel® Workstation Board S975XBX2 with
BIOS identifier BX97520J.86A.
Changes to this specification will be published in the Intel Workstation Board S975XBX2.
Specification Update before being incorporated into a revision of this document.
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Intel.
®
Workstation boards are evaluated as Information Technology Equipment (I.T.E.) for use in personal
October 2006
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or “undefined.” Intel reserves these for future definition and shall have no responsibility whatsoever for
conflicts or incompatibilities arising from future changes to them.
Intel Workstation boards may contain design defects or errors known as errata, which may 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
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Copyright © 2006, Intel Corporation. All rights reserved.
Preface
This Technical Product Specification (TPS) specifies the board layout, components,
connectors, power and environmental requirements, and the BIOS for the Intel
Workstation Board S975XBX2. It describes the standard product and available
manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Intel
Workstation Board S975XBX2 and its 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
®
Chapter Description
1 A description of the hardware used on the Workstation Board S975XBX2
2 A map of the resources of the Workstation Board
3 The features supported by the BIOS Setup program
4 A description of the BIOS error messages, beep codes, and POST codes
5 Regulatory compliance and battery disposal information
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.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
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Intel Workstation Board S975XBX2 Technical Product Specification
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 Workstation Board S975XBX2, 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
Gbits/sec Gigabits 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)
Mbits/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 Overview........................................................................................ 12
1.1.1 Feature Summary ................................................................ 12
1.1.2 Manufacturing Options .......................................................... 13
1.1.3 Board Layout ....................................................................... 14
1.1.4 Block Diagram ..................................................................... 16
1.2 Online Support................................................................................ 17
1.3 Processor ....................................................................................... 17
1.4 System Memory .............................................................................. 18
1.4.1 Memory Configurations ......................................................... 20
1.5 Intel® 975X Chipset ......................................................................... 24
1.5.1 USB ................................................................................... 24
1.5.2 IDE Support ........................................................................ 25
1.5.3 Real-Time Clock, CMOS SRAM, and Battery .............................. 26
1.6 Discrete Serial ATA Interface............................................................. 27
1.6.1 Serial ATA Controller............................................................. 27
1.6.2 External Serial ATA Support................................................... 27
1.7 PCI Express Connectors.................................................................... 28
1.8 IEEE-1394a Connectors .................................................................... 29
1.9 Legacy I/O Controller ....................................................................... 29
1.9.1 Serial Port........................................................................... 29
1.9.2 Parallel Port......................................................................... 30
1.9.3 Diskette Drive Controller ....................................................... 30
1.9.4 Keyboard and Mouse Interface ............................................... 30
1.10 Audio Subsystem............................................................................. 31
1.10.1 Audio Subsystem Software .................................................... 31
1.10.2 Audio Connectors ................................................................. 31
1.10.3 6-Channel (5.1) Audio Subsystem........................................... 32
1.11 LAN Subsystem............................................................................... 33
1.11.1 Intel® 82573E Gigabit Ethernet Controller ................................ 33
1.11.2 RJ-45 LAN Connector with Integrated LEDs .............................. 33
1.11.3 Alert Standard Format (ASF) Support ...................................... 34
1.11.4 Intel® Active Management Technology..................................... 34
1.11.5 LAN Subsystem Software....................................................... 36
1.12 Hardware Management Subsystem .................................................... 36
1.12.1 Hardware Monitoring and Fan Control ASIC .............................. 36
1.12.2 Thermal Monitoring .............................................................. 37
1.12.3 Fan Monitoring..................................................................... 38
1.12.4 Chassis Intrusion and Detection.............................................. 38
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Intel Workstation Board S975XBX2 Technical Product Specification
1.13 Power Management ......................................................................... 38
1.13.1 ACPI................................................................................... 38
1.13.2 Hardware Support ................................................................ 41
1.14 Trusted Platform Module................................................................... 45
2 Technical Reference
2.1 Memory Resources .......................................................................... 47
2.1.1 Addressable Memory............................................................. 47
2.1.2 Memory Map........................................................................ 49
2.2 DMA Channels................................................................................. 49
2.3 Fixed I/O Map ................................................................................. 50
2.4 PCI Configuration Space Map ............................................................ 51
2.5 Interrupts ...................................................................................... 52
2.6 PCI Conventional Interrupt Routing Map ............................................. 53
2.7 Connectors ..................................................................................... 54
2.7.1 Back Panel Connectors .......................................................... 54
2.7.2 Component-side Connectors and Headers ................................ 56
2.8 Jumper Block .................................................................................. 67
2.9 Mechanical Considerations ................................................................ 68
2.9.1 Form Factor......................................................................... 68
2.9.2 I/O Shield ........................................................................... 69
2.10 Electrical Considerations................................................................... 70
2.10.1 DC Loading.......................................................................... 70
2.10.2 Add-in Board Considerations .................................................. 70
2.10.3 Fan Header Current Capability................................................ 71
2.10.4 Power Supply Considerations ................................................. 71
2.11 Thermal Considerations.................................................................... 72
2.12 Reliability....................................................................................... 74
2.13 Environmental ................................................................................ 75
3 Overview of BIOS Features
3.1 Introduction ................................................................................... 77
3.2 Resource Configuration .................................................................... 78
3.2.1 PCI Autoconfiguration ........................................................... 78
3.2.2 PCI IDE Support................................................................... 78
3.3 System Management BIOS (SMBIOS)................................................. 79
3.4 Watchdog Timer .............................................................................. 79
3.5 Legacy USB Support ........................................................................ 80
3.6 BIOS Updates ................................................................................. 80
3.6.1 Language Support ................................................................ 81
3.6.2 Custom Splash Screen .......................................................... 81
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Contents
3.7 Boot Options................................................................................... 81
3.7.1 CD-ROM Boot ...................................................................... 81
3.7.2 Network Boot....................................................................... 81
3.7.3 Booting Without Attached Devices........................................... 82
3.7.4 Changing the Default Boot Device During POST ........................ 82
3.8 BIOS Security Features .................................................................... 83
4 Error Messages and Beep Codes
4.1 Speaker ......................................................................................... 85
4.2 BIOS Beep Codes ............................................................................ 85
4.3 BIOS Error Messages ....................................................................... 85
4.4 Port 80h POST Codes ....................................................................... 86
5 Regulatory Compliance and Battery Disposal Information
5.1 Regulatory Compliance..................................................................... 91
5.1.1 Safety Regulations................................................................ 91
5.1.2 European Union Declaration of Conformity Statement................ 91
5.1.3 Product Ecology Statements................................................... 93
5.1.4 EMC Regulations .................................................................. 97
5.1.5 Product Certification Markings (Board Level)............................. 98
5.2 Battery Disposal Information............................................................. 99
Figures
1. Workstation Board Components......................................................... 14
2. Block Diagram ................................................................................ 16
3. Memory Channel and DIMM Configuration........................................... 20
4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs............ 21
5. Dual Channel (Interleaved) Mode Configuration with Three DIMMs ......... 21
6. Dual Channel (Interleaved) Mode Configuration with Four DIMMs ........... 22
7. Single Channel (Asymmetric) Mode Configuration with One DIMM .......... 23
8. Single Channel (Asymmetric) Mode Configuration with Three DIMMs....... 23
9. Location of External Serial ATA-Compatible SATA Port .......................... 27
10. Front/Back Panel Audio Connector Options for 6-Channel (5.1)
Audio Subsystem............................................................................. 32
11. LAN Connector LED Locations............................................................ 33
12. Sensors and Fan Connectors ............................................................. 37
13. Location of the Standby Power Indicator LED....................................... 44
14. Detailed System Memory Address Map ............................................... 48
15. Back Panel Connectors for 6-Channel (5.1) Audio Subsystem................. 55
16. Component-side Connectors and Headers ........................................... 56
17. Connection Diagram for Front Panel Header ........................................ 63
18. Connection Diagram for Front Panel USB Headers ................................ 65
19. Connection Diagram for Front Panel IEEE 1394a Header........................ 66
20. Location of the Jumper Block............................................................. 67
21. Board Dimensions ........................................................................... 68
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Intel Workstation Board S975XBX2 Technical Product Specification
22. I/O Shield Dimensions for Boards with the 6-Channel (5.1)
Audio Subsystem............................................................................. 69
23. Localized High Temperature Zones..................................................... 73
Tables
1. Feature Summary............................................................................ 12
2. Manufacturing Options ..................................................................... 13
3. Components Shown in Figure 1 ......................................................... 15
4. Supported Memory Configurations ..................................................... 18
5. Memory Operating Frequencies ......................................................... 19
6. LAN Connector LED States ................................................................ 33
7. Effects of Pressing the Power Switch .................................................. 39
8. Power States and Targeted System Power........................................... 40
9. Wake-up Devices and Events ............................................................ 41
10. System Memory Map ....................................................................... 49
11. DMA Channels................................................................................. 49
12. I/O Map ......................................................................................... 50
13. PCI Configuration Space Map ............................................................ 51
14. Interrupts ...................................................................................... 52
15. PCI Interrupt Routing Map ................................................................ 53
16. Component-side Connectors and Headers Shown in Figure 20................ 57
17. ATAPI CD-ROM Connector (Optional).................................................. 58
18. Front Panel Audio Header ................................................................. 58
19. Front Chassis, Rear Chassis, and MCH Fan Headers .............................. 58
20. Processor Fan and Auxiliary Rear Fan Header ...................................... 58
21. Chassis Intrusion Header .................................................................. 59
22. SCSI Hard Drive Activity LED Header (Optional)................................... 59
23. Serial ATA Connectors ...................................................................... 59
24. Main Power Connector...................................................................... 61
25. Processor Core Power Connector (2 x 4 Pin) ........................................ 61
26. Processor Core Power Connector (2 x 2 Pin) ........................................ 61
27. Auxiliary PCI Express Graphics Power ................................................. 61
28. Auxiliary Front Panel Power/Sleep LED Header ..................................... 62
29. Front Panel Header .......................................................................... 63
30. States for a One-Color Power LED ...................................................... 64
31. States for a Two-Color Power LED ...................................................... 64
32. BIOS Setup Configuration Jumper Settings.......................................... 67
33. DC Loading Characteristics ............................................................... 70
34. Fan Header Current Capability........................................................... 71
35. Thermal Considerations for Components ............................................. 74
36. Environmental Specifications............................................................. 75
37. BIOS Setup Program Menu Bar .......................................................... 78
38. BIOS Setup Program Function Keys.................................................... 78
39. Boot Device Menu Options ................................................................ 82
40. Supervisor and User Password Functions............................................. 83
41. Beep Codes .................................................................................... 85
viii
Contents
42. BIOS Error Messages ....................................................................... 85
43. Port 80h POST Code Ranges.............................................................. 86
44. Port 80h POST Codes ....................................................................... 87
45. Typical Port 80h POST Sequence........................................................ 90
46. Safety Regulations........................................................................... 91
47. Lead-Free Board Markings ................................................................ 96
48. EMC Regulations ............................................................................. 97
49. Product Certification Markings ........................................................... 98
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Intel Workstation Board S975XBX2 Technical Product Specification
x
1 Product Description
What This Chapter Contains
1.1 Overview........................................................................................ 12
1.2 Online Support................................................................................ 17
1.3 Processor ....................................................................................... 17
1.4 System Memory .............................................................................. 18
1.5 Intel® 975X Chipset ......................................................................... 24
1.6 Discrete Serial ATA Interface............................................................. 27
1.7 PCI Express Connectors.................................................................... 28
1.8 IEEE-1394a Connectors .................................................................... 29
1.9 Legacy I/O Controller ....................................................................... 29
1.10 Audio Subsystem............................................................................. 31
1.11 LAN Subsystem............................................................................... 33
1.12 Hardware Management Subsystem .................................................... 36
1.13 Power Management ......................................................................... 38
1.14 Trusted Platform Module................................................................... 45
11
Intel Workstation Board S975XBX2 Technical Product Specification
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the board.
Table 1. Feature Summary
Form Factor
Processor
Memory
Chipset
Audio Intel® High Definition Audio subsystem
Legacy I/O Control Legacy I/O controller for diskette drive, serial, parallel, and PS/2 ports
USB Support for USB 2.0 devices
Peripheral
Interfaces
BIOS
Instantly Available
PC Technology
LAN Support
ATX (12.00 inches by 9.60 inches [304.80 millimeters by 243.84 millimeters])
®
• Intel
Core™2 Extreme Processor in an LGA775 socket with a 1066 MHz
system bus
®
• Intel
Core™2 Duo Processor in an LGA775 socket with a 1066 MHz system
bus
®
• Intel
Pentium® Processor Extreme Edition in an LGA775 socket with a 1066 or
800 MHz system bus
®
• Intel
Pentium® 4 Processor Extreme Edition in an LGA775 socket with a
1066 MHz system bus
®
• Intel
Pentium® D Processor in an LGA775 socket with an 800 MHz system bus
• Intel® Pentium® 4 Processor in an LGA775 socket with an 800 MHz system bus
• Four 240-pin DDR2 SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for DDR2 800, DDR2 667, and DDR2 533 MHz DIMMs
• Support for up to 8 GB of system memory
• Support for ECC and non-ECC memory
®
Intel
975X Chipset, consisting of:
®
• Intel
• Intel
82975X Memory Controller Hub (MCH)
®
82801GR I/O Controller Hub (ICH7-R)
• Eight USB ports
• One serial port
• One parallel port
• Four Serial ATA interfaces with RAID support
• One Parallel ATA IDE interface with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2* keyboard and mouse ports
®
• Intel
BIOS resident in the SPI Flash device
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
• Watchdog timer providing automatic recovery after two failed power-on
self-tests (POSTs)
• Support for PCI Local Bus Specification Revision 2.2
• Support for PCI Express* Revision 1.0a
• Suspend to RAM support
• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports
Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the Intel
Ethernet Controller
®
82573E Gigabit
continued
12
Product Description
Table 1. Feature Summary (continued)
Expansion
Capabilities
Hardware Monitor
Subsystem
• Two PCI* Conventional bus add-in card connectors (SMBus routed to both PCI
Conventional bus add-in card connectors)
• One Primary PCI Express x16 (electrical x16 or x8) bus add-in card connector
• One Secondary PCI Express x16 (electrical x8) bus add-in card connector
• One PCI Express x16 (electrical x4) bus add-in card connector
• Hardware monitoring and fan control ASIC
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Three fan headers
• Three fan sense inputs used to monitor fan activity
• Fan speed control
• Support for Product Environmental Control Interface (PECI)
1.1.2 Manufacturing Options
Table 2 describes the manufacturing options. 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 2. Manufacturing Options
AMT
ATAPI CD-ROM
Connector
Audio Subsystem
Auxiliary PCI
Express Graphics
Power Connector
Discrete SATA
RAID Controller
IEEE-1394a
Interface
MCH Fan Header
Processor Core
Power Connector
SCSI Hard Drive
LED Header
Trusted Platform
Module (TPM)
BIOS support for Intel
A 1 x 4-pin ATAPI-style connector for connecting an internal ATAPI CD-ROM drive to
the audio mixer
• Intel High Definition Audio subsystem in 6-channel (5.1) audio subsystem with
three analog audio outputs using the Sigmatel 9227 audio codec
Provides required additional power when using high power (75 W or greater) add-in
cards in either or both the Secondary PCI Express x16 (electrical x8) and the PCI
Express x16 (electrical x4) bus add-in card connectors
• Marvell* 88SE6145 SATA RAID controller
• Four SATA connectors (in addition to the four SATA connectors on the ICH7-R
SATA interface)
IEEE-1394a controller and two IEEE-1394a connectors: one back panel connector
and one front-panel header
A 3-pin header for powering a fan for the Intel
(MCH)
One of the following connectors for providing +12 V power to the processor voltage
regulator:
• 2 x 4-pin (requires a power supply with a dual-rail 2 x 4 power cable). Boards
equipped with the 2 x 4-pin processor core power connector will also include
heatsinks in the processor voltage regulator area.
• 2 x 2-pin
Allows add-in hard drive controllers (SCSI or other) to use the same LED as the
onboard IDE controller
A component that enhances platform security
®
Active Management Technology (Intel® AMT)
®
82975X Memory Controller Hub
13
Intel Workstation Board S975XBX2 Technical Product Specification
For information about Refer to
Available configurations for the board Section 1.2, page 17
1.1.3 Board Layout
Figure 1 shows the location of the major components.
Figure 1. Workstation Board Components
Table 3 lists the components identified in Figure 1.
14
Table 3. Components Shown in Figure 1
Item/callout
from Figure 1 Description
A
B
C
D
E
F
G
H
I
J Auxiliary PCI Express Graphics Power Connector (optional)
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
AA
BB
CC
DD
EE
FF
GG
HH
II
JJ
Auxiliary rear fan header
PCI Conventional bus add-in card connector 2
PCI Express x16 (electrical x4) bus add-in card connector
PCI Conventional bus add-in card connector 1
Secondary PCI Express x16 (electrical x8) bus add-in card connector
Front panel audio header
®
82801G I/O Controller Hub (ICH7-R)
Intel
Primary PCI Express x16 (electrical x16 or x8) bus add-in card connector
Rear chassis fan header
Back panel connectors
ATAPI CD-ROM connector (optional)
Processor core power connector
Memory Controller Hub (MCH) fan header (optional)
LGA775 processor socket
Intel 82975X MCH
DIMM Channel A sockets [2]
Processor fan header
DIMM Channel B sockets [2]
Main power connector
Diskette drive connector
BIOS Setup configuration jumper block
Chassis intrusion header
Onboard power button (optional)
Battery
Parallel ATE IDE connector
Serial ATA connectors (ICH7-R) [4]
Front chassis fan header
Auxiliary front panel power LED header
Front panel USB headers [2]
IEEE-1394a front panel header
Serial ATA RAID connectors (Discrete RAID) (optional) [3]
Serial ATA RAID connector compatible with external Serial ATA adapter (red)
SCSI Hard Drive Activity LED header (optional)
Front panel header
Speaker
Product Description
15
Intel Workstation Board S975XBX2 Technical Product Specification
1.1.4 Block Diagram
Figure 2 is a block diagram of the major functional areas of the board.
PCI Express x16
(Electrical x4) Slot
Parallel ATA
IDE Connector
LGA775
Processor
Socket
Primary
PCI Express
x16 Connector
Secondary
PCI Express
x16 Connector
PCI Express
X16 Interface
Channel A
DIMMs (2)
PCI Express Interface
Parallel ATA
IDE Interface
System Bus
(1066/800 MHz)
Intel 975X Chipset
Intel 82975X
Memory Controller
Hub (MCH)
Dual-Channel
Memory Bus
SMBus
SMBus
SMBus
Intel 82801GR/
82801GH
I/O Controller Hub
(ICH7-R/ICH7-DH)
DMI Interconnect
Gigabit Ethernet
Controller
USB
LPC Bus
I/O
Controller
LPC
Back Panel/Front Panel
Bus
LPC Bus
LAN
Connector
USB Ports
Serial Port
Parallel Port
PS/2 Mouse
PS/2 Keyboard
Diskette Drive
Connector
Serial Peripheral
Interface (SPI)
Flash
Device
TPM Component
(Optional)
Channel B
DIMMs (2)
IEEE-1394a Connectors
(Optional)
SATA RAID
Connectors (4)
(Optional)
PCI Slot 1
PCI Slot 2
IEEE-1394a
Controller
(Optional)
Discrete SATA RAID
Controller
(Optional)
SMBus
Hardware Monitoring
and Fan Control ASIC
Figure 2. Block Diagram
PCI Bus
PCI
Bus
PCI
Bus
SATA IDE
Interface
Front Panel Mic In
Front Panel Line Out
High Definition Audio Link
Audio
Codec
Surround Left-Right/Retasking Jack
Mic In/Retasking Jack
Line In/Retasking Jack
Line Out/Retasking Jack
CD-ROM (Optional)
Center and LFE/Retasking Jack
Connectors (4)
S/PDIF
SATA IDE
OM18546
16
Product Description
1.2 Online Support
To find information about… Visit this World Wide Web site:
Intel Workstation Board S975XBX2
under “Server Board Products” or
“Server Board Support”
Available configurations for the
Workstation Board S975XBX2
Processor data sheets http://www.intel.com/design/litcentr
ICH7-R/ICH7-DH 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/bx2/bx2_available.htm
1.3 Processor
The board is designed to support the following processors:
• Intel Core 2 Extreme Processor in an LGA775 socket with a 1066 MHz system bus
• Intel Core 2 Duo Processor in an LGA775 socket with a 1066 MHz system bus
• Intel Pentium Processor Extreme Edition in an LGA775 socket with a 1066 or
800 MHz system bus
• Intel Pentium 4 Processor Extreme Edition in an LGA775 socket with a 1066 MHz
system bus
• Intel Pentium D Processor in an LGA775 socket with an 800 MHz system bus
• Intel Pentium 4 Processor in an LGA775 socket with an 800 MHz system bus
See the Intel web site listed below for the most up-to-date list of supported processors.
For information about… Refer to:
Supported processors for the board http://www.intel.com/design/motherbd/bx2/bx2_proc.htm
CAUTION
Use only the processors listed on web site above. Use of unsupported processors can
damage the board, the processor, and the power supply.
INTEGRATOR’S NOTE
#
This board has specific requirements for providing power to the processor. Refer to
Section 2.7.2.1 on page 60 for information on power supply requirements for this
board.
17
Intel Workstation Board S975XBX2 Technical Product Specification
1.4 System Memory
The board has four DIMM sockets and supports the following memory features:
• 1.8 V and 1.9 V DDR2 SDRAM DIMMs
• Unbuffered, single-sided or double-sided DIMMs with the following restriction:
Double-sided DIMMS with x16 organization are not supported.
• 8 GB maximum total system memory. Refer to Section 2.1.1 on page 47 for
information on the total amount of addressable memory.
• Minimum total system memory: 128 MB
• ECC DIMMs and non-ECC DIMMs
• Serial Presence Detect
• DDR2 800, DDR2 667, and DDR2 533 MHz SDRAM DIMMs
NOTES
• Remove the Primary PCI Express x16 (electrical x16 or x8) video card before
installing or upgrading memory to avoid interference with the memory retention
mechanism.
• 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. If nonSPD memory is installed, the BIOS will attempt to correctly configure the memory
settings, but performance and reliability may be impacted or the DIMMs may not
function under the determined frequency.
Table 4 lists the supported DIMM configurations.
Table 4. Supported Memory Configurations
DIMM
Capacity
128 MB SS 256 Mbit 16 M x 16/empty 4 [5]
256 MB SS 256 Mbit 32 M x 8/empty 8 [9]
256 MB SS 512 Mbit 32 M x 16/empty 4 [5]
512 MB DS 256 Mbit 32 M x 8/32 M x 8 16 [18]
512 MB SS 512 Mbit 64 M x 8/empty 8 [9]
512 MB SS 1 Gbit 64 M x 16/empty 4 [5]
1024 MB DS 512 Mbit 64 M x 8/64 M x 8 16 [18]
1024 MB SS 1 Gbit 128 M x 8/empty 8 [9]
2048 MB DS 1 Gbit 128 M x 8/128 M x 8 16 [18]
Notes:
1. In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM)
and “SS” refers to single-sided memory modules (containing one row of SDRAM).
2. In the fifth column, the number in brackets specifies the number of SDRAM devices on an ECC DIMM.
Configuration
(Note 1)
SDRAM
Density
SDRAM Organization
Front-side/Back-side
Number of SDRAM
Devices
(Note 2)
18
Product Description
INTEGRATOR’S NOTE
#
Refer to Section 2.1.1, on page 47 for additional information on available memory.
NOTE
Regardless of the DIMM type used, the memory frequency will either be equal to or
less than the processor system bus frequency. For example, if DDR2 800 memory
is used with a 533 MHz system bus frequency processor, the memory will operate
at 533 MHz. Table 5 lists the resulting operating memory frequencies based on the
combination of DIMMs and processors.
Table 5. Memory Operating Frequencies
DIMM Type Processor System Bus Frequency Resulting Memory Frequency
DDR2 533 800 MHz 533 MHz
DDR2 533 1066 MHz 533 MHz
DDR2 667 800 MHz 667 MHz
DDR2 667 1066 MHz 667 MHz
DDR2 800 800 MHz 800 MHz
DDR2 800 1066 MHz 800 MHz
19
Intel Workstation Board S975XBX2 Technical Product Specification
1.4.1 Memory Configurations
The Intel 82975X MCH supports two types of memory organization:
• Dual channel (Interleaved) mode. This mode offers the highest throughput for
real world applications. Dual channel mode is enabled when the installed memory
capacities of both DIMM channels are equal. Technology and device width can vary
from one channel to the other but the installed memory capacity for each channel
must be equal. If different speed DIMMs are used between channels, the slowest
memory timing will be used.
• Single channel (Asymmetric) mode. This mode is equivalent to single channel
bandwidth operation for real world applications. This mode is used when only a
single DIMM is installed or the memory capacities are unequal. Technology and
device width can vary from one channel to the other. If different speed DIMMs are
used between channels, the slowest memory timing will be used.
Figure 3 illustrates the memory channel and DIMM configuration.
NOTE
The DIMM0 sockets of both channels are blue. The DIMM1 sockets of both channels
are black.
Channel A, DIMM 0
Channel A, DIMM 1
Channel B, DIMM 0
Channel B, DIMM 1
Figure 3. Memory Channel and DIMM Configuration
OM18526
20
Product Description
1.4.1.1 Dual Channel (Interleaved) Mode Configurations
Figure 4 shows a dual channel configuration using two DIMMs. In this example, the
DIMM0 (blue) sockets of both channels are populated with identical DIMMs.
1 GB
1 GB
Channel A, DIMM 0
Channel A, DIMM 1
Channel B, DIMM 0
Channel B, DIMM 1
OM18527
Figure 4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs
Figure 5 shows a dual channel configuration using three DIMMs. In this example, the
combined capacity of the two DIMMs in Channel A equal the capacity of the single
DIMM in the DIMM0 (blue) socket of Channel B.
256 MB
256 MB
Channel A, DIMM 0
Channel A, DIMM 1
512 MB
Channel B, DIMM 0
Channel B, DIMM 1
OM18528
Figure 5. Dual Channel (Interleaved) Mode Configuration with Three DIMMs
21
Intel Workstation Board S975XBX2 Technical Product Specification
Figure 6 shows a dual channel configuration using four DIMMs. In this example, the
combined capacity of the two DIMMs in Channel A equal the combined capacity of the
two DIMMs in Channel B. Also, the DIMMs are matched between DIMM0 and DIMM1
of both channels.
256 MB
512 MB
256 MB
512 MB
Channel A, DIMM 0
Channel A, DIMM 1
Channel B, DIMM 0
Channel B, DIMM 1
OM18529
Figure 6. Dual Channel (Interleaved) Mode Configuration with Four DIMMs
22
Product Description
1.4.1.2 Single Channel (Asymmetric) Mode Configurations
NOTE
Dual channel (Interleaved) mode configurations provide the highest memory
throughput.
Figure 7 shows a single channel configuration using one DIMM. In this example, only
the DIMM0 (blue) socket of Channel A is populated. Channel B is not populated.
1 GB
Channel A, DIMM 0
Channel A, DIMM 1
Channel B, DIMM 0
Channel B, DIMM 1
Figure 7. Single Channel (Asymmetric) Mode Configuration with One DIMM
OM18530
Figure 8 shows a single channel configuration using three DIMMs. In this example, the
combined capacity of the two DIMMs in Channel A does not equal the capacity of the
single DIMM in the DIMM0 (blue) socket of Channel B.
256 MB
512 MB
512 MB
Channel A, DIMM 0
Channel A, DIMM 1
Channel B, DIMM 0
Channel B, DIMM 1
OM18531
Figure 8. Single Channel (Asymmetric) Mode Configuration with Three
DIMMs
23
Intel Workstation Board S975XBX2 Technical Product Specification
1.5 Intel® 975X Chipset
The Intel 975X chipset consists of the following devices:
• Intel 82975X Memory Controller Hub (MCH) with Direct Media Interface (DMI)
interconnect
• Intel 82801GR I/O Controller Hub (ICH7-R) with DMI interconnect
The MCH is a centralized controller for the system bus, the memory bus, the PCI
Express bus, and the DMI interconnect. The ICH7 is a centralized controller for the
board’s I/O paths. The BIOS code is stored in the Serial Peripheral Interface (SPI)
Flash device.
For information about Refer to
The Intel 975X chipset http://developer.intel.com/
Resources used by the chipset Chapter 2
1.5.1 USB
The board supports up to eight USB 2.0 ports, supports UHCI and EHCI, and uses
UHCI- and EHCI-compatible drivers.
The ICH7-R provides the USB controller for all ports. The port arrangement is as
follows:
• Four ports are implemented with dual stacked back panel connectors adjacent to
the audio connectors
• Four ports are routed to two separate front panel USB headers
NOTES
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.
For information about Refer to
The location of the USB connectors on the back panel Figure 15, page 55
The location of the front panel USB headers Figure 16, page 56
24
Product Description
1.5.2 IDE Support
The board provides five IDE interface connectors:
• One parallel ATA IDE connector that supports two devices
• Four serial ATA IDE connectors that support one device per connector
1.5.2.1 Parallel ATE IDE Interface
The ICH7-R’s Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE
interface. The Parallel ATA IDE interface supports 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 ICH7-R/
ICH7-DH’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 Parallel ATA IDE interface also supports ATAPI devices (such as CD-ROM drives)
and ATA devices using the transfer modes.
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.
For information about Refer to
The location of the Parallel ATA IDE connector Figure 16, page 56
1.5.2.2 Serial ATA Interfaces
The ICH7-R’s Serial ATA controller offers four independent Serial ATA ports with a
theoretical maximum transfer rate of 3 Gbits/sec per port. One device can be installed
on each port for a maximum of four Serial ATA devices. A point-to-point interface is
used for host to device connections, unlike Parallel ATA IDE which supports a
master/slave configuration and two devices per channel.
For compatibility, the underlying Serial ATA functionality is transparent to the
operating system. The Serial ATA controller can operate in both legacy and native
modes. In legacy mode, standard IDE I/O and IRQ resources are assigned (IRQ 14
and 15). In Native mode, standard PCI Conventional bus resource steering is used.
25
Intel Workstation Board S975XBX2 Technical Product Specification
Native mode is the preferred mode for configurations using the Microsoft Windows* XP
and Microsoft Windows 2000 operating systems.
NOTE
Many Serial ATA drives use new low-voltage power connectors and require adaptors or
power supplies equipped with low-voltage power connectors.
For more information, see: http://www.serialata.org/
For information about Refer to
The location of the Serial ATA IDE connectors on the S975XBX2 board Figure 16, page 56
1.5.2.3 Serial ATA RAID
The ICH7-R supports the following RAID (Redundant Array of Independent Drives)
levels:
• RAID 0 - data striping
• RAID 1 - data mirroring
• RAID 0+1 (or RAID 10) - data striping and mirroring
• RAID 5 - distributed parity
1.5.2.4 SCSI Hard Drive Activity LED Header
The SCSI hard drive activity LED header is a 1 x 2-pin header that allows an add-in
hard drive controller to use the same LED as the onboard IDE controller. For proper
operation, this header should be wired to the LED output of the add-in hard drive
controller. The LED indicates when data is being read from, or written to, either the
add-in hard drive controller or the onboard IDE controller (Parallel ATA or Serial ATA).
For information about Refer to
The location of the SCSI hard drive activity LED header Figure 16, page 56
The signal names of the SCSI hard drive activity LED header Table 22, page 59
1.5.3 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.
When the voltage drops below a certain level, the BIOS Setup program settings stored
in CMOS RAM (for example, the date and time) might not be accurate. Replace the
battery with an equivalent one. Figure 1 on page 14 shows the location of the battery.
26
Product Description
1.6 Discrete Serial ATA Interface
1.6.1 Serial ATA Controller
As a manufacturing option, the board provides a Marvell 88SE6145 Serial ATA (SATA)
controller and four connectors (that support one device per connector) for SATA
devices. These connectors are in addition to the four SATA connectors of the ICH7-R
SATA interface.
The Marvell 88SE6145 controller uses the PCI bus for data transfer with a theoretical
maximum transfer rate of 3 Gbits/sec per port. The discrete SATA interface supports
the following RAID levels:
• RAID 0
• RAID 1
NOTE
The Marvell 88SE6145 controller supports single drive non-RAID configurations as well
as RAID configurations.
For information about Refer to
The location of the discrete SATA RAID connectors Figure 16, page 56
1.6.2 External Serial ATA Support
The red Serial ATA connector can be used with a back panel adapter for an external
SATA drive. Figure 9 shows the location of the External Serial ATA-compatible SATA
port.
Figure 9. Location of External Serial ATA-Compatible SATA Port
27
Intel Workstation Board S975XBX2 Technical Product Specification
1.7 PCI Express Connectors
The board provides the following PCI Express connectors:
• One Primary PCI Express x16 (electrical x16 or x8) bus add-in card connector. The
x16 interface supports simultaneous (full duplex) transfers up to 8 GBytes/sec.
Single-ended (half duplex) transfers are supported at up to 4 GBytes/sec.
• One Secondary PCI Express x16 (electrical x8) bus add-in card connector: The
board provides a PCI Express add-in card connector in the form of a physical x16
connector with electrical routing of x8. This connector is an electrical equivalent of
a PCI Express x8 bus add-in card connector. This connector also supports x4 and
x1 PCI Express add-in cards.
• One PCI Express x16 (electrical x4) bus add-in card connector: The board
provides a PCI Express add-in card connector in the form of a physical x16
connector with electrical routing of x4. This connector is an electrical equivalent of
a PCI Express x4 bus add-in card connector. This connector supports x4 and x1
PCI Express add-in cards.
For optimum performance, observe the following recommendations for the PCI Express
add-in card connectors:
• If you are installing a single PCI Express Graphics card, install it in the Primary
PCI Express x16 (electrical x16 or x8) bus add-in card connector.
• If you are installing two PCI Express Graphics cards, install them in the Primary
PCI Express x16 (electrical x16 or x8) bus add-in card connector and the
Secondary PCI Express x16 (electrical x8) bus add-in card connector.
The PCI Express interfaces for the Primary and Secondary PCI Express x16 connectors
are routed through the MCH. The PCI Express interface for the PCI Express x16
(electrical x4) connector is routed through the ICH7-R/ICH7-DH. Therefore, the
Primary and Secondary PCI Express x16 connectors provide higher performance than
the PCI Express x16 (electrical x4) bus add-in card connector.
For information about Refer to
The locations of the specific PCI Express x16 add-in card connectors Figure 1, page 14
INTEGRATOR’S NOTE
#
Although the PCI Express specification allows x16 cards to auto-negotiate down from
x16 to x4 and x1 and may function properly, such configurations have not been
validated on this board. Please consult your add-in card vendor prior to attempting to
use a PCI Express x16 add-in card in this connector.
The PCI Express interface supports the PCI Conventional bus configuration mechanism
so that the underlying PCI Express architecture is compatible with PCI Conventional
compliant operating systems. Additional features of the PCI Express interface includes
the following:
• Support for the PCI Express enhanced configuration mechanism
• Automatic discovery, link training, and initialization
• Support for Active State Power Management (ASPM)
28
Product Description
• SMBus 2.0 support
• Wake# signal supporting wake events from ACPI S1, S3, S4, or S5
• Software compatible with the PCI Power Management Event (PME) mechanism
defined in the PCI Power Management Interface Specification, Rev. 1.1
1.8 IEEE-1394a Connectors
The optional IEEE-1394 interface addresses interconnection of both computer
peripherals and consumer electronics with these features:
• IEEE-1394a operation
• Support for up to 63 peer-to-peer devices
• Operation ranging from 100 Mbits/sec to 400 Mbits/sec (depending on cable type)
• Connection over short and long distances
• Support for both asynchronous and isochronous data transfer
As a manufacturing option, the board includes two IEEE-1394a connectors as follows:
• One IEEE-1394a connector located on the back panel.
• One IEEE-1394a front-panel header located on the component side.
For information about Refer to
The location of the back panel IEEE-1394a connector Error! Reference source
not found., page Error!
Bookmark not defined.
The location of the front panel IEEE-1394a header Figure 16, page 56
The signal names of the front panel IEEE-1394a header Section 2.7.2.6, page 66
1.9 Legacy I/O Controller
The legacy 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 Conventional
bus 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 Conventional bus power management support
The BIOS Setup program provides configuration options for the legacy I/O controller.
1.9.1 Serial Port
The board has one serial port connector located on the back panel. The serial port
supports data transfers at rates of up to 115.2 kbits/sec with BIOS support.
29
Intel Workstation Board S975XBX2 Technical Product Specification
For information about Refer to
The location of the serial port A connector Figure 15, page 55
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 15, page 55
1.9.3 Diskette Drive Controller
The legacy 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 S975XBX2 board Figure 16, page 56
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 15, page 55
30
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