Intel BOXD845GVFNL User manual

August 2004
Order Number: C83644-001
The Intel®Desktop Board D845GVFN 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 D845GVFN Specification Update.
Intel®Desktop Board
D845GVFN
Technical Product Specification

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board D845GVFN Technical Product
Specification. August 2004
This product specification applies to only standard Intel®Desktop Board D845GVFN with BIOS
identifier FN84510A.86A.
Changes to this specification will be published in the Intel Desktop Board D845GVFN
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
PROPERTY RIGHT.
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 products are not intended for use in medical, life saving, or life sustaining applications or for any other application in
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®Desktop Board D845GVFN may contain design defects or errors known as errata that 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 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, 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 ©2004, Intel Corporation. All rights reserved.

iii
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for the Intel®Desktop Board D845GVFN. It
describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Board
D845GVFN 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
Chapter Description
1 A description of the hardware used on the Desktop Board D845GVFN
2 A map of the resources of the desktop board
3 The features supported by the BIOS Setup program
4 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.
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.

Intel Desktop Board D845GVFN Technical Product Specification
iv
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 Board D845GVFN, 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.

v
Contents
1Product Description
1.1 Overview......................................................................................................................10
1.1.1 Feature Summary..........................................................................................10
1.1.2 Manufacturing Options ..................................................................................11
1.1.3 Board Layout.................................................................................................12
1.2 Block Diagram..............................................................................................................13
1.3 Online Support.............................................................................................................14
1.4 Operating System Support...........................................................................................14
1.5 Design Specifications...................................................................................................15
1.6 Processor.....................................................................................................................18
1.7 System Memory...........................................................................................................19
1.8 Intel®845GV Chipset...................................................................................................21
1.8.1 Intel®Extreme Graphics Controller................................................................21
1.8.2 USB...............................................................................................................26
1.8.3 IDE Interfaces................................................................................................26
1.8.4 Real-Time Clock, CMOS SRAM, and Battery................................................27
1.9 I/O Controller................................................................................................................28
1.9.1 Serial Ports....................................................................................................28
1.9.2 Parallel Port...................................................................................................28
1.9.3 Diskette Drive Controller................................................................................28
1.9.4 Keyboard and Mouse Interface .....................................................................28
1.10 Audio Subsystem.........................................................................................................29
1.10.1 Audio Connectors..........................................................................................29
1.10.2 Audio Subsystem Software ...........................................................................30
1.11 LAN Subsystem (Optional)...........................................................................................30
1.11.1 Intel®82562ET Platform LAN Connect Device..............................................30
1.11.2 RJ-45 LAN Connector with Integrated LEDs.................................................31
1.11.3 LAN Subsystem Software..............................................................................31
1.12 Hardware Management Subsystem (Optional)............................................................31
1.12.1 Hardware Monitoring and Fan Control ASIC.................................................31
1.12.2 Fan Monitoring...............................................................................................32
1.12.3 Chassis Intrusion and Detection....................................................................32
1.13 Power Management.....................................................................................................32
1.13.1 ACPI..............................................................................................................32
1.13.2 Hardware Support .........................................................................................35
2Technical Reference
2.1 Introduction ..................................................................................................................39
2.2 Memory Map................................................................................................................39
2.3 Fixed I/O Map...............................................................................................................40
2.4 DMA Channels.............................................................................................................41
2.5 PCI Configuration Space Map......................................................................................41
2.6 Interrupts......................................................................................................................42
2.7 PCI Interrupt Routing Map ...........................................................................................43

Intel Desktop Board D845GVFN Technical Product Specification
vi
2.8 Connectors...................................................................................................................45
2.8.1 Back Panel Connectors.................................................................................46
2.8.2 Internal I/O Connectors .................................................................................47
2.8.3 External I/O Connectors................................................................................52
2.9 Jumper Blocks..............................................................................................................56
2.9.1 Front Panel Audio Connector/Jumper Block .................................................56
2.9.2 BIOS Setup Configuration Jumper Block ......................................................57
2.10 Mechanical Considerations..........................................................................................58
2.10.1 I/O Shield.......................................................................................................59
2.11 Electrical Considerations..............................................................................................60
2.11.1 DC Loading....................................................................................................60
2.11.2 Add-in Board Considerations.........................................................................60
2.11.3 Fan Connector Current Capability.................................................................60
2.11.4 Power Supply Considerations .......................................................................61
2.12 Thermal Considerations...............................................................................................61
2.13 Reliability......................................................................................................................63
2.14 Environmental..............................................................................................................63
2.15 Regulatory Compliance................................................................................................64
2.15.1 Safety Regulations ........................................................................................64
2.15.2 EMC Regulations...........................................................................................64
2.15.3 European Union Declaration of Conformity Statement..................................65
2.15.4 Product Ecology Statements.........................................................................65
2.15.5 Product Certification Markings (Board Level)................................................66
3Overview of BIOS Features
3.1 Introduction ..................................................................................................................67
3.2 BIOS Flash Memory Organization ...............................................................................68
3.3 Resource Configuration ...............................................................................................68
3.3.1 PCI Autoconfiguration....................................................................................68
3.3.2 PCI IDE Support............................................................................................69
3.4 System Management BIOS (SMBIOS) ........................................................................69
3.5 Legacy USB Support....................................................................................................70
3.6 BIOS Updates..............................................................................................................70
3.6.1 Language Support.........................................................................................71
3.6.2 Custom Splash Screen..................................................................................71
3.7 Boot Options ................................................................................................................71
3.7.1 CD-ROM Boot ...............................................................................................71
3.7.2 Network Boot.................................................................................................71
3.7.3 Booting Without Attached Devices................................................................72
3.7.4 Changing the Default Boot Device During POST..........................................72
3.8 Fast Booting Systems with Intel®Rapid BIOS Boot.....................................................73
3.8.1 Peripheral Selection and Configuration.........................................................73
3.8.2 Intel Rapid BIOS Boot ...................................................................................73
3.9 BIOS Security Features ...............................................................................................74

Contents
vii
4Error Messages and Beep Codes
4.1 BIOS Error Messages..................................................................................................75
4.2 Port 80h POST Codes .................................................................................................77
4.3 Bus Initialization Checkpoints ......................................................................................81
4.4 Speaker .......................................................................................................................82
4.5 BIOS Beep Codes........................................................................................................82
Figures
1. Desktop Board D845GVFN Components ....................................................................12
2. Block Diagram..............................................................................................................13
3. Location of the Standby Power Indicator LED on the D845GVFN Board ....................38
4. Back Panel Connectors................................................................................................46
5. Audio, Power, and Hardware Control Connectors.......................................................48
6. Add-in Board and Peripheral Interface Connectors .....................................................51
7. External I/O Connectors...............................................................................................52
8. Connection Diagram for Front Panel Connector..........................................................53
9. Connection Diagram for Front Panel USB Connector..................................................55
10. Location of the Jumper Blocks.....................................................................................56
11. Desktop Board Dimensions..........................................................................................58
12. I/O Shield Dimensions..................................................................................................59
13. Localized High Temperature Zones.............................................................................62
Tables
1. Feature Summary ........................................................................................................10
2. Manufacturing Options.................................................................................................11
3. Specifications...............................................................................................................15
4. Supported System Bus Frequency and Memory Speed Combinations.......................19
5. Supported DDR DIMM Configurations.........................................................................20
6. Direct Draw Supported Modes.....................................................................................22
7. Video BIOS Video Modes Supported for Analog CRTs...............................................23
8. Supported Configuration Modes ..................................................................................24
9. Details of bpp Configuration Modes.............................................................................25
10. LAN Connector LED States .........................................................................................31
11. Effects of Pressing the Power Switch ..........................................................................33
12. Power States and Targeted System Power.................................................................34
13. Wake-up Devices and Events......................................................................................34
14. Fan Connector Function/Operation..............................................................................36
15. System Memory Map ...................................................................................................39
16. I/O Map ........................................................................................................................40
17. DMA Channels.............................................................................................................41
18. PCI Configuration Space Map......................................................................................41
19. Interrupts......................................................................................................................42
20. PCI Interrupt Routing Map ...........................................................................................44
21. Front Panel Audio Connector.......................................................................................49
22. Auxiliary Line In Connector (Optional) .........................................................................49
23. ATAPI CD-ROM Connector (Optional).........................................................................49
24. ATX12V Power Connector...........................................................................................49
25. Rear Chassis Fan Connector.......................................................................................50

Intel Desktop Board D845GVFN Technical Product Specification
viii
26. Processor Fan Connector............................................................................................50
27. Main Power Connector.................................................................................................50
28. Front Chassis Fan Connector......................................................................................50
29. Chassis Intrusion Connector (Optional).......................................................................50
30. Serial Port B Connector (optional) ...............................................................................52
31. Auxiliary Front Panel Power/Sleep LED Connector.....................................................53
32. Front Panel Connector.................................................................................................53
33. States for a One-Color Power LED..............................................................................54
34. States for a Two-Color Power LED..............................................................................54
35. Front Panel Audio Connector/Jumper Block................................................................57
36. BIOS Setup Configuration Jumper Settings.................................................................57
37. DC Loading Characteristics .........................................................................................60
38. Fan Connector Current Capability................................................................................60
39. Thermal Considerations for Components ....................................................................62
40. Desktop Board D845GVFN Environmental Specifications...........................................63
41. Safety Regulations.......................................................................................................64
42. EMC Regulations.........................................................................................................64
43. Product Certification Markings.....................................................................................66
44. BIOS Setup Program Menu Bar...................................................................................68
45. BIOS Setup Program Function Keys............................................................................68
46. Boot Device Menu Options ..........................................................................................72
47. Supervisor and User Password Functions...................................................................74
48. BIOS Error Messages..................................................................................................75
49. Uncompressed INIT Code Checkpoints.......................................................................77
50. Boot Block Recovery Code Checkpoints .....................................................................77
51. Runtime Code Uncompressed in F000 Shadow RAM.................................................78
52. Bus Initialization Checkpoints ......................................................................................81
53. Upper Nibble High Byte Functions...............................................................................81
54. Lower Nibble High Byte Functions...............................................................................82
55. Beep Codes .................................................................................................................83

9
1 Product Description
What This Chapter Contains
1.1 Overview......................................................................................................................10
1.2 Block Diagram..............................................................................................................13
1.3 Online Support.............................................................................................................14
1.4 Operating System Support...........................................................................................14
1.5 Design Specifications...................................................................................................15
1.6 Processor.....................................................................................................................18
1.7 System Memory...........................................................................................................19
1.8 Intel®845GV Chipset...................................................................................................21
1.9 I/O Controller................................................................................................................28
1.10 Audio Subsystem.........................................................................................................29
1.11 LAN Subsystem (Optional)...........................................................................................30
1.12 Hardware Management Subsystem (Optional)............................................................31
1.13 Power Management.....................................................................................................32

Intel Desktop Board D845GVFN Technical Product Specification
10
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the Intel®Desktop Board D845GVFN.
Table 1. Feature Summary
Form Factor microATX (9.20 inches by 8.20 inches [233.68 millimeters by 208.28 millimeters])
Processor • Support for an Intel®Pentium®4 processor in an mPGA478 socket with a
400/533 MHz system bus
• Support for an Intel®Celeron®processor in an mPGA478 socket with a
400 MHz system bus
Memory • Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for single-sided or double-sided DIMMs (DDR333/266/200)
• Support for up to 2 GB system memory
Chipset Intel®845GV Chipset, consisting of:
• Intel®82845GV Graphics and Memory Controller Hub (GMCH)
• Intel®82801DB I/O Controller Hub (ICH4)
• 3 Mbit Firmware Hub (FWH)
Video Intel®Extreme Graphics controller
Audio Audio subsystem for AC ‘97 processing using the Realtek ALC202A codec
I/O Control SMSC LPC47M172 LPC Bus I/O controller or National Semiconductor PC87372
LPC Bus I/O controller
USB Support for USB 2.0 devices
Peripheral
Interfaces
• Up to four USB ports
• One serial port
• One parallel port
• Two IDE interfaces with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2* keyboard and mouse ports
• Three fan connectors
Expansion
Capabilities Three PCI bus add-in card connectors (SMBus routed to PCI bus connector 2)
BIOS • Intel/AMI BIOS (resident in the 3 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
Instantly Available
PC Technology
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports

Product Description
11
1.1.2 Manufacturing Options
Table 2 describes the manufacturing options on the Desktop Board D845GVFN. 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
LAN Intel®82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
Hardware Monitor
Subsystem
• Hardware monitoring and fan control ASIC
• Three fan sense inputs used to monitor fan activity
• Chassis intrusion detection
Serial Port B • Connector for a second serial port
ATAPI-style audio
connectors Two ATAPI-style audio connectors:
• Auxiliary line input
• ATAPI CD-DROM
For information about Refer to
The board’s compliance level with ACPI, Plug and Play, and SMBIOS Section 1.5, page 15
Available configurations for the Desktop Board D845GVFN Section 1.3, page 14

Intel Desktop Board D845GVFN Technical Product Specification
12
1.1.3 Board Layout
Figure 1 shows the location of the major components on the Desktop Board D845GVFN.
OM17296
E
AC D
G
I
K
J
H
F
UMONQRSTPV
X
Y
Z
AA
W
BB
B
L
Item Description Item Description
A Audio codec O Diskette drive connector
B Intel 82562ET 10/100 Mbit/sec (PLC) device
(optional) P IDE connectors
C Auxiliary line-in connector (optional) Q Speaker
D ATAPI CD-ROM connector (optional) R Battery
E Back panel connectors S Auxiliary front panel power LED connector
F +12V power connector (ATX12V) T Front chassis fan connector
G Rear chassis fan connector U Chassis intrusion connector (optional)
H Intel 82845GV GMCH V BIOS Setup configuration jumper block
I mPGA478 processor socket W 3 Mbit Firmware Hub (FWH)
J Processor fan connector X Front panel connector
K DIMM sockets Y Front panel USB connector
L Serial Port B connector (optional) Z Intel 82801DB I/O Controller Hub (ICH4)
M I/O Controller AA PCI bus add-in card connectors
N Power connector BB Front panel audio connector
Figure 1. Desktop Board D845GVFN Components

Product Description
13
1.2 Block Diagram
Figure 2 is a block diagram of the major functional areas of the board.
Intel 845GV Chipset
Intel 82801DB
I/O Controller Hub
(ICH4)
Intel 82845GV
Graphics and
Memory Controller
Hub (GMCH)
3 Mbit
Firmware Hub
(FWH)
AHA
Bus
System Bus
(400/533 MHz)
mPGA478
Processor Socket
Primary/
Secondary IDE
Diskette Drive
Connector
LPC Bus
I/O
Controller PS/2 Keyboard
PS/2 Mouse
Parallel Port
Serial Ports
UDMA 33 and
ATA-66/100
LPC
Bus
OM17285
Realtek
ALC202A
Audio
Codec Auxiliary Line In (optional)
Mic In
Line Out
CD-ROM (optional)
Line In
LAN
Connector
(optional)
Physical
Layer
Interface
(Optional)
DIMM Banks (2)
= connector or socket
PCI Bus
SMBus
AC Link
Back Panel /
Front Panel
USB Ports
USB
VGA Port
Display
Interface
Memory Bus
PCI Slot 1
PCI Slot 2
PCI Slot 3
SMBus
SMBus
CSMA/CD
Unit
Interface
Figure 2. Block Diagram

Intel Desktop Board D845GVFN Technical Product Specification
14
1.3 Online Support
To find information about… Visit this World Wide Web site:
Intel Desktop Board D845GVFN under
“Desktop Board Products” or “Desktop
Board Support”
http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
Available configurations for the Desktop
Board D845GVFN http://developer.intel.com/design/motherbd/fn/fn_available.htm
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
1.4 Operating System Support
The Desktop Board D845GVFN supports drivers for all of the onboard hardware and subsystems
under the following operating systems:
• Windows* XP
• Windows ME
• Windows 2000
• Microsoft Windows 98 SE
For information about Refer to
Supported drivers Section 1.3

NOTE
Third party vendors may offer other drivers.

Product Description
15
1.5 Design Specifications
Table 3 lists the specifications applicable to the Desktop Board D845GVFN.
Table 3. Specifications
Reference
Name Specification Title Version, Revision Date, and Ownership The information is available from…
AC ’97 Audio Codec ’97 Revision 2.2,
September 2000,
Intel Corporation.
ftp://download.intel.com/labs/
media/audio/download/ac97r2
2.pdf
ACPI Advanced Configuration and
Power Interface
Specification
Version 1.0b,
February 08, 1999,
Intel Corporation,
Microsoft Corporation, and
Toshiba Corporation.
http://www.acpi.info/spec10b.
htm
ASF Alert Standard Format (ASF)
Specification Version 1.03,
June 20, 2001,
DMTF,
Intel Corporation.
http://www.dmtf.org/standards
/documents/ASF/DSP0114.pd
f
ATA/
ATAPI-5 Information Technology-AT
Attachment with Packet
Interface - 5 (ATA/ATAPI-5)
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
http://www.t13.org
ATX ATX Specification Version 2.03,
December 1998,
Intel Corporation.
http://www.formfactors.org/de
veloper/specs/atx/atxspecs.ht
m
ATX12V ATX/ATX12V Power Supply
Design Guide Version 1.2,
August 2000,
Intel Corporation.
http://www.formfactors.org/de
veloper/specs/atx/atxspecs.ht
m
BIS Boot Integrity Services (BIS)
Application Programming
Interface (API)
Version 1.0,
August 4, 1999,
Intel Corporation.
http://www.intel.com/labs/man
age/wfm/wfmspecs.htm
Double Data Rate (DDR)
SDRAM Specification Version 1.0,
June 2000,
JEDEC Solid State
Technology Association.
http://www.jedec.org/
Design Specification for a
184 Pin DDR Unbuffered
DIMM
Revision 1.0,
October 2001,
JEDEC Solid State
Technology Association.
http://www.jedec.org/
DDR
SDRAM
Intel®JEDEC DDR 200/266
Unbuffered DIMM
Specification Addendum
Revision 0.9,
September 27, 2001,
Intel Corporation.
http://developer.intel.com/tech
nology/memory/index.htm
continued

Intel Desktop Board D845GVFN Technical Product Specification
16
Table 3. Specifications (continued)
Reference
Name Specification Title Version, Revision Date and Ownership The information is available from…
EHCI Enhanced Host
Controller Interface
Specification for
Universal Serial Bus
Revision 1.0,
March 12, 2002,
Intel Corporation.
http://developer.intel.com/te
chnology/usb/download/ehc
i-r10.pdf
EPP IEEE Std 1284.1-1997
(Enhanced Parallel Port) Version 1.7, 1997,
Institute of Electrical and
Electronic Engineers.
http://standards.ieee.org/re
ading/ieee/std_public/descri
ption/busarch/1284.1-
1997_desc.html
El Torito Bootable CD-ROM
Format Specification Version 1.0,
January 25, 1995,
Phoenix Technologies Limited
and International Business
Machines Corporation.
http://www.phoenix.com/res
ources/specs-cdrom.pdf
LPC Low Pin Count Interface
Specification Revision 1.0,
September 29, 1997,
Intel Corporation.
http://www.intel.com/design
/chipsets/industry/lpc.htm
MicroATX microATX Motherboard
Interface Specification Version 1.0,
December 1997,
Intel Corporation.
http://www.formfactors.org/
developer/specs/microatx/
microatx.htm
PCI PCI Local Bus
Specification Revision 2.2,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/speci
fications
PCI Bus Power
Management Interface
Specification
Revision 1.1,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/speci
fications
Plug and
Play Plug and Play BIOS
Specification Version 1.0a,
May 5, 1994,
Compaq Computer Corporation,
Phoenix Technologies Limited,
and Intel Corporation.
http://www.microsoft.com/h
wdev/tech/PnP/default.asp
PXE Preboot Execution
Environment Version 2.1,
September 20, 1999,
Intel Corporation.
ftp://download.intel.com/lab
s/manage/wfm/download/
/pxespec.pdf
SFX SFX/SFX12V Power
Supply Design Guide Version 2.0,
May 2001,
Intel Corporation.
http://www.formfactors.org/
developer/specs/sfx/sfx12v.
pdf
continued

Product Description
17
Table 3. Specifications (continued)
Reference
Name Specification Title Version, Revision Date and Ownership The information is available from…
SMBIOS System Management
BIOS 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.
http://www.dmtf.org/downlo
ad/standards/DSP0119.pdf
TFX12V TFX12V Power Supply
Design Guide Revision 1.01,
May 2002
Intel Corporation
http://www.formfactors.org/
developer/specs/tfx12v/tfx1
2v_psdg_101.pdf
UHCI Universal Host Controller
Interface Design Guide Revision 1.1,
March 1996,
Intel Corporation.
http://developer.intel.com/d
esign/USB/UHCI11D.htm
USB Universal Serial Bus
Specification 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.
http://www.usb.org/develop
ers/docs.html
WfM Wired for Management
Baseline Version 2.0,
December 18, 1998,
Intel Corporation.
http://www.intel.com/labs/m
anage/wfm/wfmspecs.htm

Intel Desktop Board D845GVFN Technical Product Specification
18
1.6 Processor

NOTE
Refer to Thermal Considerations (Section 2.12, page 61) for important information when using an
Intel Pentium 4 processor operating above 2.80 GHz with this Intel desktop board.
The board is designed to support the following:
• Intel Pentium 4 processors in an mPGA478 processor socket with a 533/400 MHz system bus
• Intel Celeron processors in an mPGA478 processor socket with a 400 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 D845GVFN board http://www.intel.com/design/motherbd/fn/fn_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 NOTES
• Use only ATX12V-, SFX12V-, or TFX12V-compliant power supplies with the Desktop Board
D845GVFN. ATX12V, SFX12V, and TFX12V 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, SFX12V, and TFX12V 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 4 on page 19 for a list of supported system bus frequency and memory speed
combinations.
For information about Refer to
Power supply connectors Section 2.8.2.2, page 48

Product Description
19
1.7 System Memory
The Desktop Board D845GVFN has two DIMM sockets and supports the following memory
features:
• 2.5 V (only) 184-pin DDR SDRAM DIMMs with gold-plated contacts
• Unbuffered single-sided or double-sided DIMMs
• Maximum total system memory: 2 GB; minimum total system memory: 64 MB
• DDR333/266/200 MHz SDRAM DIMMs only
• Serial Presence Detect (SPD)
• Suspend to RAM
Table 4 lists the supported system bus frequency and memory speed combinations.
Table 4. Supported System Bus Frequency and Memory Speed Combinations
If the processor's system bus frequency is… You can use this type of DIMM…
533 MHz DDR333 or DDR266
400 MHz DDR266 or DDR200
CAUTION
Do not use ECC DIMMs with this board. Using ECC DIMMs could damage the board.
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INTEGRATOR’S NOTES
• Registered DIMMs are not supported.
• Double-sided x16 DIMMs are not supported.
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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 15
Obtaining the PC Serial Presence Detect (SPD) Specification Section 1.5, page 15

Intel Desktop Board D845GVFN Technical Product Specification
20
Table 5 lists the supported DDR DIMM configurations.
Table 5. Supported DDR DIMM Configurations
DIMM
Capacity Configuration
(Note) DDR SDRAM
Density DDR SDRAM Organization Front-side/Back-side Number of DDR SDRAM Devices
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/empty 8
1024 MB DS 512 Mbit 64 M x 8/64 M x 8 16
Note: In this column, “DS” refers to double-sided memory modules (containing DDR SDRAM devices on both sides)
and “SS” refers to single-sided memory modules (containing DDR SDRAM devices on only one side).