Intel D945GBO User manual

Intel® Desktop Board D945GBO
Product Guide
Order Number: D21839-002

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board D945GBO Product Guide November 2005
-002 Second release of the Intel®Desktop Board D945GBO Product Guide May 2006
If an FCC declaration of conformity marking is present on the board, the following statement applies:
FCC Declaration of Conformity
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device
may not cause harmful interference, and (2) this device must accept any interference received, including interference that
may cause undesired operation.
For questions related to the EMC performance of this product, contact:
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124
1-800-628-8686
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and the receiver.
•Connect the equipment to an outlet on a circuit other than the one to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications to the equipment not expressly approved by Intel Corporation could void the user’s authority to
operate the equipment.
Tested to comply with FCC standards for home or office use.
Canadian Department of Communications Compliance Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the
Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numerique német pas de bruits radioélectriques dépassant les limites applicables aux appareils
numériques de la classe B prescrites dans le Réglement sur le broullage radioélectrique édicté par le ministére des
Communications du Canada.
Disclaimer
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. Intel products are not intended for use in medical,
life saving, or life sustaining applications. Intel may make changes to specifications and product descriptions at any time,
without notice.
Desktop Board D945GBO 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 and 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 by going to the World Wide Web site at: http://www.intel.com/ or by calling
1-800-548-4725.
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 © 2005-2006, Intel Corporation. All rights reserved.

iii
Preface
This Product Guide gives information about board layout, component installation, BIOS update,
and regulatory requirements for Intel®Desktop Board D945GBO.
Intended Audience
The Product Guide is intended for technically qualified personnel.
Use Only for Intended Applications
All Intel desktop boards are evaluated as Information Technology Equipment (I.T.E.) for use in
personal computers (PC) for installation in homes, offices, schools, computer rooms, and similar
locations. The suitability of this product for other PC or embedded non-PC applications or other
environments, such as medical, industrial, alarm systems, test equipment, etc. may not be supported
without further evaluation by Intel.
Information Layout
The chapters in this Product Guide are arranged as follows:
1 Desktop Board Features: a summary of product features
2 Installing and Replacing Desktop Board Components: instructions on how to install the desktop
board and other hardware components
3 Updating the BIOS: instructions on how to update the BIOS
4 Configuring for RAID (Intel®Matrix Storage Technology) Requires Serial ATA (SATA) Hard
Drives: information about configuring your system for RAID
5 Intel®Quick Resume Technology Driver (Intel®QRTD):information about installing and
configuring Intel Quick Resume Technology Driver
A Error Messages and Indicators: information about BIOS error messages and beep codes
B Regulatory Compliance: information about safety and EMC regulations, and product
certifications
Conventions
The following conventions are used in this manual:
CAUTION
Cautions warn the user about how to prevent damage to hardware or loss of data.
NOTE
Notes call attention to important information.

ntel Desktop Board D945GBO Product Guide
iv
Terminology
The table below gives descriptions to some common terms used in the product guide.
Term Description
GB Gigabyte (1,073,741,824 bytes)
GHz Gigahertz (one billion hertz)
KB Kilobyte (1024 bytes)
MB Megabyte (1,048,576 bytes)
Mbit Megabit (1,048,576 bits)
MHz Megahertz (one million hertz)
Box Contents
•Intel Desktop Board D945GBO
•I/O shield
•One ATA-66/100 cable
•Two locking Serial ATA cables
•One diskette drive cable
•One VGA port cover
•Quick Reference poster
•Configuration and battery caution statement label
•Intel®Express Installer driver CD-ROM
•Intel Express Installer software DVD-ROM
•Intel®Matrix Storage Technology floppy diskette

v
Contents
1Desktop Board Features
Supported Operating Systems ............................................................................................10
Desktop Board Components ...............................................................................................11
Processor............................................................................................................................13
Main Memory ......................................................................................................................14
Intel®945G Express Chipset...............................................................................................15
Graphics Subsystem ...........................................................................................................15
Audio Subsystem ................................................................................................................15
Input/Output (I/O) Controller ................................................................................................16
LAN Subsystem ..................................................................................................................16
LAN Subsystem Software...........................................................................................16
RJ-45 LAN Connector LEDs.......................................................................................16
Hi-Speed USB 2.0 Support..................................................................................................17
Enhanced IDE Interface ......................................................................................................17
Serial ATA...........................................................................................................................17
Expandability.......................................................................................................................18
BIOS ...................................................................................................................................18
Serial ATA and IDE Auto Configuration ......................................................................18
PCI and PCI Express Auto Configuration ...................................................................18
Security Passwords....................................................................................................18
Chassis Intrusion.................................................................................................................19
Power Management Features .............................................................................................19
ACPI...........................................................................................................................19
Power Connectors......................................................................................................19
Fan Connectors..........................................................................................................19
Fan Speed Control (Intel®Precision Cooling Technology)..........................................19
Suspend to RAM (Instantly Available PC Technology) ...............................................20
Wake from USB..........................................................................................................21
Wake from PS/2* Keyboard/Mouse ............................................................................21
PME# Wakeup Support ..............................................................................................21
Speaker...............................................................................................................................21
Battery.................................................................................................................................21
Real-Time Clock..................................................................................................................21
2Installing and Replacing Desktop Board Components
Before You Begin ................................................................................................................23
Installation Precautions .......................................................................................................24
Installation Instructions........................................................................................................24
Ensure Electromagnetic Compatibility (EMC) Compliance..........................................24
Chassis and Component Certifications.......................................................................25
Prevent Power Supply Overload.................................................................................25
Place Battery Marking ................................................................................................25
Installing the I/O Shield .......................................................................................................26
Installing and Removing the Desktop Board........................................................................27

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vi
Installing and Removing a Processor ..................................................................................28
Installing a Processor .................................................................................................28
Installing the Processor Fan Heat Sink.......................................................................31
Connecting the Processor Fan Heat Sink Cable.........................................................31
Removing the Processor ............................................................................................31
Installing and Removing Memory ........................................................................................32
Installing DIMMs.........................................................................................................34
Removing DIMMs.......................................................................................................35
Installing and Removing a PCI Express* x16 Card..............................................................36
Installing a PCI Express x16 Card ..............................................................................36
Removing the PCI Express x16 Card .........................................................................36
Connecting the IDE Cable...................................................................................................37
Connecting a Serial ATA (SATA) Cable ..............................................................................38
Connecting Internal Headers...............................................................................................39
Installing a Front Panel Audio Solution for Intel®High Definition Audio.......................40
Connecting USB 2.0 Headers.....................................................................................41
Connecting IEEE 1394a Headers...............................................................................41
Connecting the Front Panel Header ...........................................................................41
Connecting Fan and Power Cables .....................................................................................42
Connecting Fan Cables ..............................................................................................42
Connecting Power Cables ..........................................................................................43
Other Connectors................................................................................................................44
Setting the BIOS Configuration Jumper Block .....................................................................45
Clearing Passwords ............................................................................................................46
3Updating the BIOS
Updating with the Intel®Express BIOS Update Utility..........................................................53
Updating with the Iflash BIOS Update Utility........................................................................54
Obtaining the BIOS Update File..................................................................................54
Updating the BIOS......................................................................................................54
Recovering the BIOS..................................................................................................55
4Configuring Intel®Matrix Storage Technology (RAID) Requires Serial
ATA (SATA) Hard Drives
Configuring the BIOS for Intel Matrix Storage Technology ..................................................57
Creating Your RAID Set (for systems with more than one SATA hard drive) .......................57
Loading the Intel Matrix Storage Technology RAID Drivers and Software ...........................58
Setting Up a “RAID Ready” System.....................................................................................58
5Intel®Quick Resume Technology Driver (Intel®QRTD)
Overview .............................................................................................................................59
Installation and Configuration ..............................................................................................59
AError Messages and Indicators
BIOS Beep Codes...............................................................................................................63
BIOS Error Messages .........................................................................................................63

Contents
vii
BRegulatory Compliance
Safety Regulations ..............................................................................................................65
European Union Declaration of Conformity Statement ........................................................65
Product Ecology Statements ...............................................................................................67
Lead-Free Desktop Board ..........................................................................................69
EMC Regulations ................................................................................................................70
Product Certification Markings (Board Level) ......................................................................71
Figures
1. Desktop Board D945GBO Components........................................................................11
2. LAN Port LED Locations...............................................................................................16
3. Location of Standby Power Indicator.............................................................................20
4. Installing the I/O Shield.................................................................................................26
5. Desktop Board D945GBO Mounting Screw Hole Locations ..........................................27
6. Lift Socket Lever...........................................................................................................28
7. Lift the Load Plate and Don’t Touch the Socket Contacts .............................................28
8. Remove the Protective Socket Cover ...........................................................................29
9. Remove the Processor from the Protective Processor Cover/Do Not Touch.................29
10. Install Processor ...........................................................................................................30
11. Close the Load Plate ....................................................................................................30
12. Connecting the Processor Fan Heat Sink Cable to the Processor Fan Connector ........31
13. Dual Configuration Example 1 ......................................................................................32
14. Dual Configuration Example 2 ......................................................................................32
15. Dual Configuration Example 3 ......................................................................................33
16. Installing a DIMM..........................................................................................................34
17. Inserting a PCI Express x16 Card and Covering the Back Panel VGA Port ..................36
18. Connecting the IDE Cable ............................................................................................37
19. Connecting a Serial ATA Cable ....................................................................................38
20. Internal Headers ...........................................................................................................39
21. Location of Fan Headers...............................................................................................42
22. Connecting Power Supply Cables.................................................................................43
23. Location of Other Connectors on Desktop Board D945GBO.........................................44
24. Location of the BIOS Configuration Jumper..................................................................45
25. Removing the Battery ...................................................................................................51
26. F2 Key ..........................................................................................................................53

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viii
Tables
1. Feature Summary...........................................................................................................9
2. Desktop Board D945GBO Components........................................................................12
3. Power Supply Requirements.........................................................................................13
4. Desktop Board D945GBO Memory Configurations .......................................................14
5. RJ-45 10/100/1000 Gigabit Ethernet LAN Connector LEDs ..........................................17
6. Front Panel Audio Header Signal Names for Intel High Definition Audio.......................40
7. AC ’97 Audio Header Signal Names .............................................................................40
8. USB 2.0 Header Signal Names.....................................................................................41
9. IEEE 1394a Header Signal Names...............................................................................41
10. Front Panel Header Signal Names................................................................................41
11. Jumper Settings for the BIOS Setup Program Modes ...................................................45
12. Beep Codes..................................................................................................................63
13. BIOS Error Messages...................................................................................................63
14. Safety Regulations........................................................................................................65
15. Lead-Free Board Markings ...........................................................................................69
16. EMC Regulations..........................................................................................................70
17. Product Certification Markings ......................................................................................71

9
1 Desktop Board Features
This chapter briefly describes the main features of Intel®Desktop Board D945GBO. Table 1
summarizes the major features of the desktop board.
Table 1. Feature Summary
Form Factors MicroBTX (10.5-inches x 10.4-inches)
Processor Support for an Intel®processor in the LGA775 package
Main Memory •Four 240-pin, 1.8 V SDRAM Dual Inline Memory Module (DIMM) sockets
•667/533/400 MHz single or dual channel DDR2 SDRAM interface
•Designed to support up to 4 GB of system memory
NOTE: System resources (such as PCI and PCI Express*) require physical
memory address locations that reduce available memory addresses above 3 GB.
This may result in less than 4 GB of memory being available to the operating
system and applications. For the latest list of tested memory, refer to the Intel
World Wide Web site at: http://support.intel.com/support/motherboards/desktop/
Chipset Intel®945G Express Chipset consisting of:
•Intel®82945G Graphics and Memory Controller Hub (GMCH) with Direct
Media Interface
•Intel®82801GH I/O Controller Hub (ICH7DH) supporting Intel®Matrix Storage
Technology
•Serial Peripheral Interface (SPI) Flash or Firmware Hub (FWH)
Graphics Intel 945G Express Chipset with Intel®Graphics Media Accelerator 950
Audio •Intel 945G Express Chipset
•Intel®High Definition Audio interface
•SigmaTel* codec
Expansion Capabilities •Two PCI bus add-in card connectors (SMBus routed to PCI bus 2)
•One PCI Express* x16 connector
•One PCI Express x1 connector
Peripheral Interfaces •Up to eight USB 2.0 ports
⎯Four ports routed to the back panel
⎯Four ports routed to two USB headers
•Up to three IEEE 1394a ports
⎯One port routed to the back panel
⎯Two ports routed to two IEEE 1394a headers
•Intel®82573L Gigabit Ethernet Controller with an RJ-45 connector
•Four Serial ATA (SATA) channels (3.0 Gb/s), via the ICH7DH, one device per
channel
•One IDE interface with ATA-66/100 support (two devices)
•One VGA connector
•One diskette drive interface
•One serial port
•PS/2* keyboard and mouse ports
continued

Intel Desktop Board D945GBO Product Guide
10
Table 1. Feature Summary (continued)
BIOS •Intel®Platform Innovation Framework for Extensible Firmware Interface (EFI)
•4 Mbit symmetrical flash memory
•Support for SMBIOS
•Intel®Rapid BIOS Boot
•Intel®Express BIOS Update
Power Management •Support for Advanced Configuration and Power Interface (ACPI)
•Suspend to RAM (STR)
•Wake on USB, PCI, PCI Express, PS/2, LAN, and front panel
Hardware Management Hardware monitor with:
•Three fan sensing inputs used to monitor fan activity
•Remote diode temperature sensing
•Intel®Precision Cooling Technology fan speed control
•Voltage sensing to detect out of range values
Related Links:
For more information about desktop board D945GBO, including the Technical Product
Specification (TPS), BIOS updates, and device drivers, go to:
http://support.intel.com/support/motherboards/desktop/
Supported Operating Systems
The desktop board supports the Microsoft Windows* XP Media Center Edition 2005 Update
Rollup 2 operating system.

Desktop Board Features
11
Desktop Board Components
Figure 1 shows the approximate location of the major components on desktop board D945GBO.
EF
G
H
ABCD
I
J
K
L
M
N
O
P
Q
R
Optical Line Out
1394a
IEEE
Line In
OM18081
Channel A DIMM 0
Channel A DIMM 1
Channel B DIMM 0
Channel B DIMM 1
Intel 82945G
(GMCH)
R
S
(Toslink)
82801
(ICH7DH)
Intel
R
Figure 1. Desktop Board D945GBO Components

Intel Desktop Board D945GBO Product Guide
12
Table 2. Desktop Board D945GBO Components
Label Description
A Front panel audio header
B Serial ATA connectors
C Hi-speed USB 2.0 headers
D BIOS configuration jumper block
E Main power connector (2x12)
F PCI Express x16 connector
G PCI Express x1 connector
H PCI bus add-in card connectors
I IEEE 1394a headers
J Diskette drive connector
K Front panel header
L Front chassis fan header (3-pin, fan speed control)
M Alternate power LED header
N Processor socket
O 12 V processor core voltage connector (2x2)
P Processor fan header (4-pin, fan speed control)
Q Rear chassis fan header 1 (3-pin, fan speed control)
R IDE connector
S Chassis intrusion header
Related Links:
Go to the following links for more information about:
•Desktop board D945GBO http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
•Supported processors http://support.intel.com/support/motherboards/desktop
•Audio software and utilities http://www.intel.com/design/motherbd
•LAN software and drivers http://www.intel.com/design/motherbd

Desktop Board Features
13
Processor
CAUTION
Failure to use the appropriate power supply (below) and/or not connecting the 12 V (2x2) power
connector to the desktop board may result in damage to the board, or the system may not function
properly.
Table 3. Power Supply Requirements
Platform Compatibility Guide Power Supply Requirements
05B 12V2 rating of 16 A continuous and 19 A peak current for 10mS
05A 12V2 rating of 13 A continuous and 16.5 A peak current for 10mS
04B or 04A ATX12V (version 2.0 or greater) compliant power supply
Desktop board D945GBO supports an Intel®processor in the LGA775 package. The processor
connects to the desktop board through the LGA775 socket. Processors are not included with the
desktop board and must be purchased separately. The supported processors list for desktop board
D945GBO is located on the web at: http://support.intel.com/support/motherboards/desktop/
Related Links:
Go to the following links or pages for more information about:
•Instructions on installing or upgrading the processor, page 28 in Chapter 2
•The location of the two power connectors, page 42 in Chapter 2

Intel Desktop Board D945GBO Product Guide
14
Main Memory
NOTE
To be fully compliant with all applicable Intel®SDRAM memory specifications, the board should
be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. If your
memory modules do not support SPD, you will see a notification to this effect on the screen at
power up. The BIOS will attempt to configure the memory controller for normal operation.
The desktop board supports dual or single channel memory configurations defined in Table 4.
Table 4. Desktop Board D945GBO Memory Configurations
Memory Speed FSB Frequency (MHz) Memory Speed (MHz)
1066 667
800 667
DDR2 667
533 533
1066 533
800 533
DDR2 533
533 533
800 400DDR2 400
533 400
•Four 240-pin Double Data Rate 2 (DDR2) SDRAM Dual Inline Memory Module (DIMMs)
connectors with gold-plated contacts
•Unbuffered, non-registered single or double-sided DIMMs
•Serial Presence Detect (SPD) memory only
•Non-ECC RAM
•1.8 V memory
•Memory configuration listed below:
⎯Up to 2.0 GB utilizing 256 Mb technology
⎯Up to 4.0 GB utilizing 512 Mb or 1 Gb technology
NOTE
System resources (such as PCI and PCI Express) require physical memory address locations that
reduce available memory addresses above 3 GB. This may result in less than 4 GB of memory
being available to the operating system and applications.
Related Links:
Go to the following links or pages for more information about:
•The latest list of tested memory, http://support.intel.com/support/motherboards/desktop/
•SDRAM specifications, http://www.intel.com/technology/memory/
•Installing memory, page 32 in Chapter 2

Desktop Board Features
15
Intel®945G Express Chipset
The Intel 945G Express Chipset consists of the following devices:
•Intel 82945G Graphics and Memory Controller Hub (GMCH) with Digital Media Interface
•Intel 82801GH I/O Controller Hub (ICH7DH) supporting Intel Matrix Storage Technology
•Serial Peripheral Interface (SPI) Flash or Firmware Hub (FWH)
Related Link:
Go to the following link for more information about the Intel 945G Express Chipset:
http://developer.intel.com/design/nav/pcserver.htm
Graphics Subsystem
Desktop board D945GBO includes the following:
•Intel 945G Express Chipset
•Intel Graphics Media Accelerator 950
•PCI Express x16 connector for graphics expansion
Audio Subsystem
Desktop board D945GBO includes a flexible 8-channel audio subsystem based on an Intel®High
Definition Audio interface:
The audio subsystem features:
•Intel®82801GH I/O Controller Hub (ICH7DH)
•SigmaTel STAC9223D audio codec
•Impedance sensing capability for jack re-tasking
•S/N (signal-to-noise) ratio: 95 dB
•Microphone input supporting:
⎯Stereo microphone
⎯Microphone boost
The subsystem includes the following connectors:
•Front panel audio connector, including functionality for:
⎯Line out
⎯Mic in
•Back panel audio connectors that are configurable through the drivers of the audio devices:
⎯Line in
⎯Line out
⎯Mic in
⎯Center/LFE out
⎯Rear left and right out

Intel Desktop Board D945GBO Product Guide
16
Related Links:
Go to the following link or pages for more information about:
•Audio drivers and utilities http://support.intel.com/support/motherboards/desktop/
•Installing the front panel audio solution, page 40 in Chapter 2
Input/Output (I/O) Controller
The super I/O controller features the following:
•Low pin count (LPC) interface
•One serial port
•Serial IRQ interface compatible with serialized IRQ support for PCI systems
•PS/2-style mouse and keyboard interfaces
•Interface for one 1.2 MB or 1.44 MB diskette drive
•Intelligent power management, including a programmable wake up event interface
•PCI power management support
LAN Subsystem
The LAN subsystem supports the following features:
•10/100/1000 Gigabit Ethernet LAN (Intel®82573L)
•Support for RJ-45 connector with status indicator LEDs
•Programmable transit threshold
•Configurable EEPROM that contains the MAC address
LAN Subsystem Software
For LAN software and drivers, refer to the D945GBO link on Intel’s World Wide Web site at:
http://support.intel.com/support/motherboards/desktop
RJ-45 LAN Connector LEDs
Two LEDs are built into the RJ-45 LAN port located on the back panel (see Figure 2).
OM17386
Figure 2. LAN Port LED Locations

Desktop Board Features
17
Table 5 describes the LED states when the board is powered up and the 10/100/1000 Gigabit
Ethernet LAN subsystem is operating.
Table 5. RJ-45 10/100/1000 Gigabit Ethernet LAN Connector LEDs
LED LED Color LED State Indicates
Left Off LAN link is not established. Green
On LAN link is established.
Blinking LAN activity is occurring.
N/A Off 10 Mb/s data rate is selected.
Green On 100 Mb/s data rate is selected.
Right
Yellow On 1000 Mb/s data rate is selected.
Hi-Speed USB 2.0 Support
NOTE
Computer systems that have an unshielded cable attached to a USB port might not meet FCC
Class B requirements, even if no device or a low-speed USB device is attached to the cable.
Use a shielded cable that meets the requirements for a full-speed USB device.
The desktop board supports up to eight USB 2.0 ports via the ICH7DH; four ports routed to the
back panel and four routed to two internal USB 2.0 headers. USB 2.0 ports are backward
compatible with USB 1.1 devices. USB 1.1 devices will function normally at USB 1.1 speeds.
USB 2.0 support requires both an operating system and drivers that fully support USB 2.0 transfer
rates. Disabling Hi-Speed USB in the BIOS reverts all USB 2.0 ports to USB 1.1 operation. This
may be required to accommodate operating systems that do not support USB 2.0.
Enhanced IDE Interface
The ICH7DH’s IDE interface handles the exchange of information between the processor and
peripheral devices like hard disks, CD-ROM drives, and Iomega Zip* drives inside the computer.
The interface supports:
•Up to two IDE devices (such as hard drives)
•ATAPI-style devices (such as CD-ROM drives)
•Older PIO Mode devices
•Ultra DMA-33 and ATA-66/100 protocols
•Laser Servo (LS-120) drives
Serial ATA
The desktop board supports four Serial ATA channels (3.0 Gb/s) via the ICH7DH, connecting one
device per channel.

Intel Desktop Board D945GBO Product Guide
18
Expandability
The desktop board supports the following:
•One PCI Express x16 add-in card
•One PCI Express x1 add-in card
•Two PCI add-in cards
Related Links:
For information about installing a PCI Express x16 card, see page 36 in Chapter 2.
BIOS
The BIOS provides the Power-On Self-Test (POST), the BIOS Setup program, the PCI/PCI
Express and IDE auto-configuration utilities, and the video BIOS. The BIOS is stored in the Serial
Peripheral Interface (SPI) Flash or Firmware Hub.
The BIOS can be updated by following the instructions on page 53 in Chapter 3.
Serial ATA and IDE Auto Configuration
If you install a Serial ATA or IDE device (such as a hard drive) in your computer, the auto-
configuration utility in the BIOS automatically detects and configures the device for your computer.
You do not need to run the BIOS Setup program after installing a Serial ATA or IDE device. You
can override the auto-configuration options by specifying manual configuration in the BIOS Setup
program.
PCI and PCI Express Auto Configuration
If you install a PCI/PCI Express add-in card in your computer, the PCI/PCI Express auto-
configuration utility in the BIOS automatically detects and configures the resources (IRQs, DMA
channels, and I/O space) for that add-in card. You do not need to run the BIOS Setup program after
you install a PCI/PCI Express add-in card.
Security Passwords
The BIOS includes security features that restrict whether the BIOS Setup program can be accessed
and who can boot the computer. A supervisor password and a user password can be set for the
BIOS Setup and for booting the computer, with the following restrictions:
•The supervisor password gives unrestricted access to view and change all Setup options. If
only the supervisor password is set, pressing <Enter> at the password prompt of Setup gives the
user restricted access to Setup.
•If both the supervisor and user passwords are set, you must enter either the supervisor password
or the user password to access Setup. Setup options are then available for viewing and
changing depending on whether the supervisor or user password was entered.
•Setting a user password restricts who can boot the computer. The password prompt is
displayed before the computer is booted. If only the supervisor password is set, the computer
boots without asking for a password. If both passwords are set, you can enter either password
to boot the computer.

Desktop Board Features
19
Related Links:
For instructions on resetting the password, see Clearing Passwords on page 46.
Chassis Intrusion
The board supports a chassis security feature that detects if the chassis cover has been removed.
The security feature uses a mechanical switch on the chassis that can be connected to the chassis
intrusion header on the desktop board. See Figure 20 on page 39 for the location of the chassis
intrusion header.
Power Management Features
Power management is implemented at several levels, including:
•Advanced Configuration and Power Interface (ACPI)
•Hardware support:
⎯Power connectors
⎯Fan connectors
⎯Suspend to RAM (Instantly Available PC technology)
⎯Wake from USB
⎯Wake from PS/2 keyboard/mouse
⎯PME# wakeup support
ACPI
ACPI gives the operating system direct control over the power management and Plug and Play
functions of a computer. The use of ACPI with the desktop board requires an operating system that
provides full ACPI support.
Power Connectors
The desktop board has two power connectors. See Figure 22 on page 43 for the location of the
power connectors.
Fan Connectors
The desktop board has three fan headers: a 4-pin processor fan header and two 3-pin chassis fan
headers. See Figure 21 on page 42 for the location of the fan headers.
Fan Speed Control (Intel®Precision Cooling Technology)
Intel Precision Cooling Technology automatically adjusts the processor fan speed based on the
processor thermal diode temperature and adjusts the chassis fan speeds depending on the system
temperature. System fan noise may be reduced by operating controlled chassis and processor fans
at the minimum necessary speeds.
The processor and chassis fan speed control features can be disabled independently through the
desktop board BIOS. Disabling the processor fan speed control will result in the fan operating at
full speed if it is not a self controlled fan. It is recommended that processor fan speed control
remain enabled (default BIOS setting) when using the processor fan heat-sink included with

Intel Desktop Board D945GBO Product Guide
20
Intel®boxed processors. Disabling the chassis fan speed control results in chassis fans always
operating at full speed. The chassis fan speed control feature should be disabled if a self-controlled
chassis fan is attached to any controlled chassis fan header.
The overall system noise reduction will vary based on system configuration and environment.
Suspend to RAM (Instantly Available PC Technology)
CAUTIONS
For Instantly Available PC technology, the 5 V standby line for the power supply must be capable
of delivering adequate +5 V standby current. Failure to provide adequate standby current when
using this feature can damage the power supply and/or effect ACPI S3 sleep state functionality.
Power supplies used with this desktop board must be able to provide enough standby current to
support the standard Instantly Available (ACPI S3 sleep state) configuration. If the standby
current necessary to support multiple wake events from the PCI and/or USB buses exceeds power
supply capacity, the desktop board may lose register settings stored in memory.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-RAM) sleep
state. While in the S3 sleep state, the computer will appear to be off. When signaled by a wake-up
device or event, the system quickly returns to its last known awake state.
The desktop board’s standby power indicator, shown in Figure 3, is lit when there is standby power
to the system. This includes the memory modules and PCI bus connectors, even when the
computer appears to be off.
If the system has a dual-colored power LED on the front panel, the sleep state is indicated by the
LED turning amber.
OM18082
Figure 3. Location of Standby Power Indicator
Related Links:
For more information on standby current requirements for the desktop board, refer to the Technical
Product Specification by going to the following link, finding the product, and selecting Product
Documentation from the left-hand menu:
http://support.intel.com/support/motherboards/desktop/