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Intel® Desktop Board
DG35EC
Technical Product Specification
March 2008
Order Number: E35350-001US
The Intel® Desktop Board DG35EC 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 DG35EC Specification Update.
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Revision History
Revision Revision History Date
-001 First release of the Intel® Desktop Board DG35EC Technical Product
Specification
This product specification applies to only the standard Intel® Desktop Board DG35EC with BIOS
identifier ECG3510M.86A.
Changes to this specification will be published in the Intel Desktop Board DG35EC Specification
Update before being incorporated into a revision of this document.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. NO LICENSE,
EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS
GRANTED BY THIS DOCUMENT. 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 PROPERTY RIGHT. UNLESS OTHERWISE AGREED IN
WRITING BY INTEL, THE INTEL PRODUCTS ARE NOT DESIGNED NOR INTENDED FOR ANY APPLICATION IN
WHICH THE FAILURE OF THE INTEL PRODUCT COULD CREATE A SITUATION WHERE PERSONAL INJURY OR
DEATH MAY OCCUR.
March 2008
Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other
intellectual property 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.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked “reserved”
or “undefined.” Intel reserves these for future definition and shall have no responsibility whatsoever for
conflicts or incompatibilities arising from future changes to them.
®
desktop boards may contain design defects or errors known as errata, which may cause the product to
Intel
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, the Intel logo, Pentium, Core, and Celeron 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 © 2008, Intel Corporation. All rights reserved.
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Preface
This Technical Product Specification (TPS) specifies the board layout, components,
connectors, power and environmental requirements, and the BIOS for the Intel
Desktop Board DG35EC. It describes the standard product and available
manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Board
DG35EC 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 board
2 A map of the resources of the 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 Desktop Board DG35EC Technical Product Specification
Other Common Notation
# Used after a signal name to identify an active-low signal (such as USBP0#)
GB Gigabyte (1,073,741,824 bytes)
GB/sec Gigabytes per second
Gbit Gigabit (1, 073,741,824 bits)
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.
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Contents
1 Product Description
1.1 Overview........................................................................................ 10
1.1.1 Feature Summary ................................................................ 10
1.1.2 Board Layout ....................................................................... 12
1.1.3 Block Diagram ..................................................................... 14
1.2 Legacy Considerations...................................................................... 15
1.3 Online Support................................................................................ 15
1.4 Processor ....................................................................................... 15
1.5 System Memory .............................................................................. 16
1.5.1 Memory Configurations ......................................................... 17
1.6 Intel® G35 Express Chipset............................................................... 19
1.6.1 Intel G35 Graphics Subsystem ............................................... 19
1.6.2 USB ................................................................................... 21
1.6.3 Serial ATA Interfaces ............................................................ 21
1.7 Parallel IDE Controller ...................................................................... 22
1.8 Real-Time Clock Subsystem .............................................................. 23
1.9 Legacy I/O Controller ....................................................................... 23
1.9.1 Serial Port Interface.............................................................. 23
1.9.2 Diskette Drive Interface ........................................................ 23
1.9.3 PS/2 Keyboard and Mouse Interface........................................ 24
1.10 Audio Subsystem............................................................................. 24
1.10.1 Audio Subsystem Software .................................................... 25
1.10.2 Audio Connectors and Headers ............................................... 25
1.11 LAN Subsystem............................................................................... 26
1.11.1 Intel® 82566DC Gigabit Ethernet Controller.............................. 26
1.11.2 LAN Subsystem Software....................................................... 27
1.11.3 RJ-45 LAN Connector with Integrated LEDs .............................. 27
1.12 Hardware Management Subsystem .................................................... 28
1.12.1 Hardware Monitoring and Fan Control...................................... 28
1.12.2 Fan Monitoring..................................................................... 28
1.12.3 Chassis Intrusion and Detection.............................................. 28
1.12.4 Thermal Monitoring .............................................................. 29
1.13 Power Management ......................................................................... 30
1.13.1 ACPI................................................................................... 30
1.13.2 Hardware Support ................................................................ 33
2 Technical Reference
2.1 Memory Map................................................................................... 37
2.1.1 Addressable Memory............................................................. 37
2.2 Connectors and Headers................................................................... 40
2.2.1 Back Panel Connectors .......................................................... 41
2.2.2 Component-side Connectors and Headers ................................ 42
2.3 Jumper Block .................................................................................. 50
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Intel Desktop Board DG35EC Technical Product Specification
2.4 Mechanical Considerations ................................................................ 51
2.4.1 Form Factor......................................................................... 51
2.5 Electrical Considerations ................................................................... 52
2.5.1 Power Supply Considerations ................................................. 52
2.5.2 Fan Header Current Capability................................................ 53
2.5.3 Add-in Board Considerations .................................................. 53
2.6 Thermal Considerations .................................................................... 53
2.7 Reliability ....................................................................................... 55
2.8 Environmental ................................................................................ 56
3 Overview of BIOS Features
3.1 Introduction ................................................................................... 57
3.2 BIOS Flash Memory Organization ....................................................... 58
3.3 Resource Configuration .................................................................... 58
3.3.1 PCI Autoconfiguration ........................................................... 58
3.3.2 PCI IDE Support................................................................... 59
3.4 System Management BIOS (SMBIOS)................................................. 59
3.5 Legacy USB Support ........................................................................ 60
3.6 BIOS Updates ................................................................................. 61
3.6.1 Language Support ................................................................ 61
3.6.2 Custom Splash Screen .......................................................... 62
3.7 BIOS Recovery................................................................................ 62
3.8 Boot Options................................................................................... 63
3.8.1 CD-ROM Boot ...................................................................... 63
3.8.2 Network Boot....................................................................... 63
3.8.3 Booting Without Attached Devices........................................... 63
3.8.4 Changing the Default Boot Device During POST ........................ 63
3.9 Adjusting Boot Speed....................................................................... 64
3.9.1 Peripheral Selection and Configuration..................................... 64
3.9.2 BIOS Boot Optimizations ....................................................... 64
3.10 BIOS Security Features .................................................................... 65
4 Error Messages and Beep Codes
4.1 Speaker ......................................................................................... 67
4.2 BIOS Beep Codes ............................................................................ 67
4.3 BIOS Error Messages ....................................................................... 67
4.4 Port 80h POST Codes ....................................................................... 68
5 Regulatory Compliance and Battery Disposal Information
5.1 Regulatory Compliance..................................................................... 73
5.1.1 Safety Standards.................................................................. 73
5.1.2 European Union Declaration of Conformity Statement................ 74
5.1.3 Product Ecology Statements................................................... 75
5.1.4 EMC Regulations .................................................................. 79
5.1.5 Product Certification Markings (Board Level)............................. 80
5.2 Battery Disposal Information............................................................. 81
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Contents
Figures
1. Major Board Components.................................................................. 12
2. Block Diagram ................................................................................ 14
3. Memory Channel Configuration and DIMM Configuration........................ 18
4. Back Panel Audio Connector Options .................................................. 25
5. LAN Connector LED Locations............................................................ 27
6. Thermal Sensors and Fan Headers ..................................................... 29
7. Location of the Standby Power Indicator LED....................................... 36
8. Detailed System Memory Address Map ............................................... 38
9. Back Panel Connectors ..................................................................... 41
10. Component-side Connectors and Headers ........................................... 42
11. Connection Diagram for Front Panel Header ........................................ 47
12. Connection Diagram for Front Panel USB Headers ................................ 49
13. Location of the Jumper Block............................................................. 50
14. Board Dimensions ........................................................................... 51
15. Localized High Temperature Zones..................................................... 54
Tables
1. Feature Summary............................................................................ 10
2. Board Components Shown in Figure 1 ................................................ 13
3. Supported Memory Configurations ..................................................... 16
4. Audio Jack Support .......................................................................... 24
5. LAN Connector LED States ................................................................ 27
6. Effects of Pressing the Power Switch .................................................. 30
7. Power States and Targeted System Power........................................... 31
8. Wake-up Devices and Events ............................................................ 32
9. System Memory Map ....................................................................... 39
10. Component-side Connectors and Headers Shown in Figure 10................ 43
11. Serial ATA Connectors ...................................................................... 44
12. Chassis Intrusion Header .................................................................. 44
13. Serial Port Header ........................................................................... 44
14. Front and Rear Chassis Fan Headers .................................................. 44
15. Processor Fan Header ...................................................................... 44
16. S/PDIF Connector ............................................................................ 45
17. Front Panel Audio Header ................................................................. 45
18. Auxiliary Front Panel Power/Sleep LED Header ..................................... 45
19. Processor Core Power Connector........................................................ 46
20. Main Power Connector...................................................................... 46
21. Front Panel Header .......................................................................... 47
22. States for a One-Color Power LED ...................................................... 48
23. States for a Two-Color Power LED ...................................................... 48
24. Auxiliary Front Panel Power LED Header.............................................. 48
25. BIOS Setup Configuration Jumper Settings.......................................... 50
26. Recommended Power Supply Current Values ....................................... 52
27. Fan Header Current Capability........................................................... 53
28. Thermal Considerations for Components ............................................. 55
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Intel Desktop Board DG35EC Technical Product Specification
29. Desktop Board DG35EC Environmental Specifications ........................... 56
30. BIOS Setup Program Menu Bar .......................................................... 58
31. BIOS Setup Program Function Keys.................................................... 58
32. AcceptableDrives/Media Types for BIOS Recovery ................................ 62
33. Boot Device Menu Options ................................................................ 63
34. Supervisor and User Password Functions............................................. 65
35. Beep Codes .................................................................................... 67
36. BIOS Error Messages ....................................................................... 67
37. Port 80h POST Code Ranges.............................................................. 68
38. Port 80h POST Codes ....................................................................... 69
39. Typical Port 80h POST Sequence........................................................ 72
40. Safety Standards............................................................................. 73
41. Lead-Free Board Markings ................................................................ 78
42. EMC Regulations ............................................................................. 79
43. Product Certification Markings ........................................................... 80
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1 Product Description
What This Chapter Contains
1.1 Overview........................................................................................ 10
1.2 Legacy Considerations...................................................................... 15
1.3 Online Support................................................................................ 15
1.4 Processor ....................................................................................... 15
1.5 System Memory .............................................................................. 16
1.6 Intel® G35 Express Chipset............................................................... 19
1.7 Parallel IDE Controller ...................................................................... 22
1.8 Real-Time Clock Subsystem .............................................................. 23
1.9 Legacy I/O Controller ....................................................................... 23
1.10 Audio Subsystem............................................................................. 24
1.11 LAN Subsystem............................................................................... 26
1.12 Hardware Management Subsystem .................................................... 28
1.13 Power Management ......................................................................... 30
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Intel Desktop Board DG35EC Technical Product Specification
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the Desktop Board DG35EC.
Table 1. Feature Summary
Form Factor microATX (9.60 inches by 9.60 inches [243.84 millimeters by 243.84 millimeters])
Processor Support for the following:
Memory
Chipset
Video Intel® Graphics Media Accelerator (Intel
Audio 6-channel (5.1) audio subsystem using the Realtek* ALC888S audio codec
Legacy I/O
Control
Peripheral
Interfaces
LAN Support Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the Intel
BIOS
Instantly
Available PC
Technology
®
• Intel
Core™2 Quad processor in an LGA775 socket with a 1333 MHz or
1066 MHz system bus
®
• Intel
Core™2 Duo processor in an LGA775 socket with a 1333 MHz or 1066 or
800 MHz system bus
®
• Intel
Pentium® Dual-Core processor in an LGA775 socket with an 800 MHz
system bus
®
• Intel
Celeron® 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 667 or DDR2 800 MHz DIMMs
• Support for up to 8 GB of system memory
®
G35 Express Chipset, consisting of:
Intel
®
• Intel
• Intel
82G35 Graphics and Memory Controller Hub (GMCH)
®
82801HB I/O Controller Hub (ICH8)
®
GMA) X3500 onboard graphics subsystem
Legacy I/O controller for diskette drive, serial, and PS/2* ports
• 10 USB 2.0 ports
• Four Serial ATA interfaces
• One Parallel ATA IDE interface with UDMA 33, ATA-66/100/133 support
• One diskette drive interface
• One IEEE 1394a port and one IEEE 1394a header
• PS/2 keyboard and mouse ports
• One serial port header (may require specialized chassis or cable for use)
Ethernet Controller
®
• Intel
BIOS (resident in the SPI Flash device)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
• Support for PCI* Local Bus Specification Revision 2.3
• Support for PCI Express* Revision 1.1
• Suspend to RAM support
• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports
®
82566DC Gigabit
continued
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Table 1. Feature Summary (continued)
Expansion
Capabilities
Hardware Monitor
Subsystem
• One PCI Conventional bus connector
• Two PCI Express x1 bus add-in card connector
• One PCI Express x16 bus add-in card connector
• 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
For information about Refer to
Available configurations for the Desktop Board DG35EC Section 1.2, page 15
Product Description
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Intel Desktop Board DG35EC Technical Product Specification
1.1.2 Board Layout
Figure 1 shows the location of the major components.
Figure 1. Major Board Components
Table 2 lists the components identified in Figure 1.
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Table 2. Board Components Shown in Figure 1
Item/callout
from Figure 1 Descri
A PCI Conventional bus add-in card connector
B IEEE 1394a header
C PCI Express x1 connector
D Speaker
E PCI Express x1 connector
F PCI Express x16 connector
G Rear chassis fan header
H Back panel connectors
I Processor core power connector (2 X 2)
J LGA775 processor socket
K Processor fan header
L DIMM Channel A sockets
M DIMM Channel B sockets
N Front chassis fan header
O Serial port header
P Diskette drive connector
Q Main Power connector (2 X 12)
R Parallel ATA IDE connector
S Chassis intrusion header
T Serial ATA connectors [4]
U Front panel header
V Auxiliary front panel power LED header
W Front panel USB header
X Front panel USB header
Y Intel 82801HB I/O Controller Hub (ICH8)
Z Intel 82G35 GMCH
AA BIOS Setup configuration jumper block
BB Battery
CC S/PDIF connector
DD Front panel audio header
ption
Product Description
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Intel Desktop Board DG35EC Technical Product Specification
1.1.3 Block Diagram
Figure 2 is a block diagram of the major functional areas.
Figure 2. Block Diagram
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Product Description
1.2 Legacy Considerations
This board differs from other Intel® Desktop Board products, with specific changes
including (but not limited to) the following:
• No parallel port
• No serial port on the back panel
• The serial port header is located near the memory sockets and may require a
specialized chassis or cabling solution to use
1.3 Online Support
To find information about… Visit this World Wide Web site:
Intel Desktop Board DG35EC http://www.intel.com/products/motherboard/DG35EC/index.htm
Desktop Board Support http://support.intel.com/support/motherboards/desktop
Available configurations for the
Desktop Board DG35EC
Supported processors http://www.intel.com/go/findcpu
Chipset information http://www.intel.com/products/desktop/chipsets/index.htm
BIOS and driver updates http://downloadcenter.intel.com
Tested Memory http://support.intel.com/support/motherboards/desktop/sb/CS-
http://www.intel.com/products/motherboard/DG35EC/index.htm
025414.htm
1.4 Processor
The board is designed to support the following processors:
• Intel Core 2 Quad processor in an LGA775 socket with a 1333 MHz or 1066 MHz
system bus
• Intel Core 2 Duo processor in an LGA775 socket with a 1333 MHz or 1066 or
800 MHz system bus
• Intel Pentium Dual-Core processor in an LGA775 socket with an 800 MHz
system bus
• Intel Celeron processor in an LGA775 socket with an 800 MHz system bus
Other processors may be supported in the future. This board is designed to support
processors with a maximum wattage of 95 W. The processors listed above are only
supported when falling within the wattage requirements of the DG35EC board. See
the Intel web site listed below for the most up-to-date list of supported processors.
For information about… Refer to:
Supported processors http://www.intel.com/go/findcpu
CAUTION
Use only the processors listed on the web site above. Use of unsupported processors
can damage the board, the processor, and the power supply.
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