Intel D945GCPE - Desktop Board Motherboard Product Manual

Intel® Desktop Board D945GCPE
Product Guide

Order Number: D98018-001

Revision History

Revision Revision History Date

-001 First release of the Intel® Desktop Board D945GCPE Product Guide June 2007

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
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 D945GCPE 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, Intel logo, and Pentium 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 © 2007, Intel Corporation. All rights reserved.

OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS

Preface

This Product Guide gives information about board layout, component installation, BIOS
update, and regulatory requirements for Intel

®

Desktop Board D945GCPE.

Intended Audience

The Product Guide is intended for technically qualified personnel. It is not intended for
general audiences.

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.

Document Organization

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
A Error Messages: information about BIOS error messages
B Regulatory Compliance: lists safety standards, EMC regulations, and product

certifications for the desktop board

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.

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Intel Desktop Board D945GCPE Product Guide

Terminology

The table below gives descriptions of 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 D945GCPE

• I/O shield

• One diskette drive cable

• One ATA-66/100 cable

• Two locking Serial ATA cables

• Intel

• Quick Reference Guide

• Configuration and battery caution statement labels

®

Express Installer CD-ROM

iv

Contents

1 Desktop Board Features

Supported Operating Systems..............................................................................10

Desktop Board Components.................................................................................11

Processor..........................................................................................................13

Main Memory.....................................................................................................13

®

Intel

945GC Express Chipset..............................................................................14

Onboard Audio Subsystem ..................................................................................14

Input/Output (I/O) Controller ..............................................................................15

LAN Subsystem .................................................................................................15

LAN Subsystem Software.............................................................................15

RJ-45 LAN Connector LEDs...........................................................................16

Hi-Speed USB 2.0 Support ..................................................................................16

Enhanced IDE Interface ......................................................................................17

Serial ATA.........................................................................................................17

Expandability.....................................................................................................17

BIOS................................................................................................................17

Serial ATA and IDE Auto Configuration...........................................................17

PCI* Auto Configuration ..............................................................................18

Security Passwords.....................................................................................18

Hardware Management Features ..........................................................................18

Hardware Monitoring and Fan Speed Control ..................................................18

Chassis Intrusion Detection..........................................................................19

Power Management Features ...............................................................................19

ACPI.........................................................................................................19

Hardware Support ......................................................................................19

Power Connectors ...............................................................................19

Fan Headers .......................................................................................20

LAN Wake Capabilities..........................................................................20

Instantly Available PC Technology..........................................................20

+5 V Standby Power Indicator...............................................................21

Wake from USB ..................................................................................22

Wake from PS/2* Keyboard/Mouse ........................................................22

PME# Signal Wake-up Support..............................................................22

ENERGY STAR* Capable ..............................................................................22

Battery.............................................................................................................22

Real-Time Clock.................................................................................................22

2 Installing and Replacing Desktop Board Components

Before You Begin ...............................................................................................23

Installation Precautions.......................................................................................24

Prevent Power Supply Overload ....................................................................24

Observe Safety and Regulatory Requirements.................................................24

Installing the I/O Shield ......................................................................................25

Installing and Removing the Desktop Board ...........................................................26

Installing and Removing a Processor.....................................................................27

Installing a Processor ..................................................................................27

Installing the Processor Fan Heat Sink ...........................................................30

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Intel Desktop Board D945GCPE Product Guide

Connecting the Processor Fan Heat Sink Cable................................................31

Removing the Processor ..............................................................................31

Installing and Removing Memory..........................................................................32

Installing DIMMs ........................................................................................34

Removing DIMMs........................................................................................35

Connecting the Diskette Drive Cable .....................................................................36

Connecting the IDE Cable....................................................................................37

Connecting the Serial ATA (SATA) Cable................................................................38

Connecting to Internal Headers............................................................................39

Connecting to the Front Panel Audio Header ...................................................40

Connecting to the Serial Port Header.............................................................41

Connecting to the Chassis Intrusion Header....................................................41

Connecting to the Front Panel Header............................................................42

Connecting to the Alternate Front Panel Power LED Header...............................42

Connecting to the USB 2.0 Headers...............................................................43

Connecting to the Flexible Audio System ...............................................................43

Connecting Chassis Fan and Power Cables .............................................................44

Connecting a Chassis Fan Cable....................................................................44

Connecting Power Cables.............................................................................45

Setting the BIOS Configuration Jumper .................................................................46

Clearing Passwords ............................................................................................47

3 Updating the BIOS

Updating the BIOS with the Intel

Updating the BIOS with the Iflash Memory Update Utility.........................................53

Obtaining the BIOS Update File ....................................................................54

Updating the BIOS......................................................................................54

Recovering the BIOS...................................................................................54

®

Express BIOS Update Utility.................................53

A Error Messages

BIOS Error Messages..........................................................................................55

B Regulatory Compliance

Safety Standards ...............................................................................................57

Place Battery Marking .................................................................................57

European Union Declaration of Conformity Statement..............................................58

Product Ecology Statements ................................................................................59

Recycling Considerations .............................................................................59

Lead-Free Desktop Board.............................................................................61

EMC Regulations ................................................................................................63

Ensure Electromagnetic Compatibility (EMC) Compliance..................................64

Product Certifications..........................................................................................65

Board-Level Certification Markings ................................................................65

Chassis and Component Certifications............................................................66

vi

Contents

Figures

1. Desktop Board D945GCPE Components ...........................................................11

2. LAN Connector LEDs .....................................................................................16

3. Standby Power Indicator................................................................................21

4. Installing the I/O Shield ................................................................................25

5. Desktop Board D945GCPE Mounting Screw Hole Locations..................................26

6. Lift Socket Lever ..........................................................................................27

7. Lift the Load Plate.........................................................................................28

8. Remove the Protective Socket Cover ...............................................................28

9. Remove the Processor from the Protective Processor Cover ................................29

10. Install the Processor .....................................................................................29

11. Close the Load Plate .....................................................................................30

12. Connecting the Processor Fan Heat Sink Cable to the Processor Fan Header..........31

13. Dual Channel Memory Configuration Example ...................................................32

14. Use DDR2 DIMMs .........................................................................................33

15. Installing a DIMM .........................................................................................34

16. Connecting the Diskette Drive Cable................................................................36

17. Connecting the IDE Cable ..............................................................................37

18. Connecting the Serial ATA Cable.....................................................................38

19. Internal Headers ..........................................................................................39

20. Back Panel Audio Connectors .........................................................................43

21. Location of Chassis Fan Header ......................................................................44

22. Connecting Power Supply Cables ....................................................................45

23. Location of the BIOS Configuration Jumper Block ..............................................46

24. Removing the Battery ...................................................................................52

Tables

1. Feature Summary.......................................................................................... 9

2. Desktop Board D945GCPE Components ...........................................................12

3. LAN Connector LED States .............................................................................16

4. Front Panel Audio Header Signal Names for Intel High Definition Audio.................40

5. AC ’97 Audio Header Signal Names .................................................................40

6. Serial Port Header Signal Names.....................................................................41

7. Chassis Intrusion Header ...............................................................................41

8. Front Panel Header .......................................................................................42

9. Alternate Front Panel Power LED Header ..........................................................42

10. USB 2.0 Header Signal Names........................................................................43

11. Jumper Settings for the BIOS Setup Program Modes..........................................47

12. BIOS Error Messages ....................................................................................55

13. Safety Standards..........................................................................................57

14. Lead-Free Board Markings .............................................................................62

15. EMC Regulations...........................................................................................63

16. Product Certification Markings ........................................................................65

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Intel Desktop Board D945GCPE Product Guide

viii

1 Desktop Board Features

This chapter briefly describes the main features of Intel® Desktop Board D945GCPE.
Table 1 summarizes the major features of the desktop bo

Table 1. Feature Summary

Form Factor

Processor Support for an Intel® processor in the LGA775 package
Main Memory

Chipset Intel® 945GC Express Chipset consisting of:

Graphics

Audio

Expansion
Capabilities

Peripheral
Interfaces

microATX (218.44 millimeters [8.60 inches] x 243.84 millimeters
[9.60 inches])

• Two 240-pin, DDR2 1.8 V (only) SDRAM Dual Inline Memory Module

(DIMM) sockets

• 667/533 MHz single or dual channel DDR2 SDRAM interface

• Support for up to 2 GB of system memory

®

• Intel

• Intel

Intel 945GC Express Chipset with
(Intel

• 4-channel (2 + 2) onboard subsystem, featuring:

Two PCI* connectors

• Up to eight USB 2.0 ports

• Two Serial ATA (SATA) channels (3.0 Gb/s), via the ICH7, one device per

• One IDE interface with ATA-66/100 support (two devices)

• One diskette drive interface

• One VGA port

• One serial port header

• PS/2* keyboard and mouse ports

82945GC Express Chipset Graphics and Memory Controller Hub

(GMCH)

®

82801GB I/O Controller Hub (ICH7)

®

GMA 950)

― Intel
― Realtek* ALC662 audio codec

― Four ports routed to the back panel
― Four ports routed to two USB headers

channel

®

High Definition Audio interface

Intel® Graphics Media Accelerator 950

ard.

continued

9

Intel Desktop Board D945GCPE Product Guide

Table 1. Feature Summary (continued)

LAN Support

Power
Management

Hardware
Management

10/100 Mb/s LAN subsystem using a Realtek RTL8101E-GR Gigabit
Ethernet Controller

• Support for Advanced Configuration and Power Interface (ACPI)

• Suspend to RAM (STR)

• Wake on USB, PS/2, LAN, and front panel

• ENERGY STAR* capable

• Two fan headers

• Two fan sensing inputs used to monitor fan activity

• Remote diode temperature sensing

• Voltage sensing to detect out of range values

• Integrated SIO fan control

Related Links:

For more information about Desktop Board D945GCPE, 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 following operating systems:

• Microsoft Windows Vista* Ultimate

• Microsoft Windows Vista Home Premium

• Microsoft Windows Vista Home Premium 64-bit edition

• Microsoft Windows Vista Home Basic

• Microsoft Windows Vista Home Basic 64-bit edition

• Microsoft Windows* XP Media Center Edition 2005

• Microsoft Windows XP Professional

• Microsoft Windows XP Professional x64 Edition

• Microsoft Windows XP Home Edition

10

Desktop Board Features

Desktop Board Components

Figure 1 shows the approximate location of the major components on Desktop Board
D945GCPE.

Figure 1. Desktop Board D945GCPE Components

11

Intel Desktop Board D945GCPE Product Guide

Table 2. Desktop Board D945GCPE Compon ents

Label Description

A Front panel audio header
B PCI bus connector 2
C PCI bus connector 1
D Rear chassis fan header (3-pin)
E Back panel connectors
F 12 V processor core voltage connector (2 x 2 pin)
G Processor socket
H Processor fan header (4-pin)
I DIMM 0, Channel A socket
J DIMM 0, Channel B socket
K Main power connector (2 x 12 pin)
L Diskette drive connector
M IDE connector
N Battery
O Serial ATA connectors
P Alternate front panel power LED header
Q Front panel header
R BIOS configuration jumper block
S Chassis intrusion header
T Hi-speed USB 2.0 headers
U Serial port header

Related Links:

Go to the following links for more information about:

• Desktop Board D945GCPE

• Supported processors

• Audio software and utilities

• LAN software and drivers

http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop

http://www.intel.com/go/FindCPU
http://www.intel.com/design/motherbd
http://www.intel.com/design/motherbd

12

Desktop Board Features

Processor

CAUTION

Failure to use the appropriate power supply and/or not connecting the 12 V (2 x 2 pin)
power connector to the desktop board may result in damage to the board or the
system may not function properly.

Desktop Board D945GCPE supports an Intel processor in the LGA775 package.
Processors are not included with the desktop board and must be purchased separately.
The processor connects to the desktop board through the LGA775 socket.

The supported processors list for Desktop Board D945GCPE is located on the web at:

http://www.intel.com/go/FindCPU

Related Links:

Go to the following links or pages for more information about:

• Instructions on installing or upgrading the processor, page 27 in Chapter 2

Main Memory

NOTE

To be fully compliant with all applicable Intel® SDRAM 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 the dual or single channel memory configurations defined
below.

• Two 240-pin Double Data Rate 2 (DDR2) SDRAM Dual Inline Memory Module

(DIMM) connectors with gold-plated contacts.

• Support for:

― Unbuffered, non-registered single or double-sided DIMMs

― Non-ECC DDR2 memory

⎯ DDR2-667 and DDR2-533 memory
⎯ 1.8 V (only) DDR2 SDRAM DIMMs

― Serial Presence Detect (SPD) memory only

― Up to 2.0 GB utilizing 512 Mb and 1 Gb technology

Intel recommends using memory from the tested memory lists, available at:

http://www.cmtlabs.com/mbsearch.asp

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Intel Desktop Board D945GCPE Product Guide

NOTE

Regardless of the DIMM type used, the memory frequency will either be equal to or
less than the processor system bus frequency. For example, if DDR2 533 memory is
used with an 800 MHz system bus frequency processor, the memory will operate
at 533 MHz.

Related Links:

Go to the following links or pages for more information about:

• SDRAM specifications, http://www.intel.com/technology/memory/

• Installing memory, page 32 in Chapter 2

Intel® 945GC Express Chipset

The Intel 945GC Express Chipset consists of the following devices:

• Intel 82945GC Express Chipset Graphics and Memory Controller Hub (GMCH) with

Direct Media Interface (DMI)

• Intel 82801GB I/O Controller Hub (ICH7) with DMI
The GMCH component provides interfaces to the processor, memory, and the DMI

interconnect. The component also provides integrated graphics capabilities via the
Intel Graphics Media Accelerator 950 (Intel GMA 950).

The ICH7 is a centralized controller for the board’s I/O paths.

Related Link:

Go to the following link for more information about the Intel 945GC Express Chipset:

http://www.intel.com/products/desktop/chipsets/index.htm?iid=chips_body+desk

Onboard Audio Subsystem

Desktop Board D945GCPE has a 4-channel (2 + 2) onboard audio subsystem that
includes a Realtek ALC662 audio codec.

The audio subsystem features:

• Intel High Definition Audio interface

• Advanced jack detect

• S/N (signal-to-noise) ratio: 95 dB

• Microphone input supporting:

― Stereo microphone

― Microphone boost

The subsystem includes the following headers and connectors:

• Front panel audio header, including functionality for:

― Line out

― Microphone in

14

Desktop Board Features

• Back panel audio connectors that are configurable through the audio device

drivers:

― Line in

― Line out

― Mic in

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

• The location of au

dio connectors, Figure 20 on page 43

Input/Output (I/O) Controller

The super I/O controller features the following:

• One serial port via an onboard header

• 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

• Integrated PWM-based fan control

LAN Subsystem

The LAN subsystem consists of the following:

• Realtek RTL8101E-GR Ethernet Controller device for 10/100 Mb/s Ethernet LAN

connectivity

• RJ-45 connector with status indicator LEDs

LAN Subsystem Software

For LAN software and drivers, refer to the D945GCPE link on Intel’s World Wide Web
site at:

http://support.intel.com/support/motherboards/desktop

15

Intel Desktop Board D945GCPE Product Guide

RJ-45 LAN Connector LEDs

Two LEDs are built into the RJ-45 LAN connector located on the back panel (see
Figure 2). These LEDs indicate the statu

Figure 2. LAN Connector LEDs

s of the LAN.

Table 3 describes the LED states when the board is powered up and the LAN
subsystem is operating.

Table 3. LAN Connector LED States

LED LED Color LED State Indicates

Off LAN link is not established

A Green

B Yellow

On LAN link is established
Blinking LAN activity is occurring
Off 10 Mb/s data rate
On 100 Mb/s data rate

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 ICH7 (four ports routed to
the back panel and four ports 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.

16

Desktop Board Features

Enhanced IDE Interface

The desktop board’s IDE interface handles the exchange of information between the
processor and peripheral devices such as hard disk drives and CD-ROM drives. 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

Serial ATA

The desktop board supports two Serial ATA channels (3.0 Gb/s) via ICH7, connecting
one device per channel.

Expandability

For system expansion, the desktop board provides two PCI bus connectors.

BIOS

The BIOS provides the Power-On Self-Test (POST), the BIOS Setup program, the PCI
and IDE auto-configuration utilities, and the video BIOS. The BIOS is stored in a
Serial Peripheral Interface (SPI) Flash device.

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.

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Intel Desktop Board D945GCPE Product Guide

PCI* Auto Configuration

If you install a PCI add-in card in your computer, the PCI 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 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.

Related Links:

For instructions on resetting the password, see Clearing Passwords on page 47.

Hardware Management Features

The board has several hardware management features including the following:

• Fan speed monitoring and control

• Thermal and voltage monitoring

• Chassis intrusion detection

Hardware Monitoring and Fan Speed Control

The features of the hardware monitoring and fan speed control include:

• Monitoring of power supply voltages to detect levels above and below acceptable

values

• Integrated SIO fan control

• Thermal sensors in the processor, GMCH, and ICH7 plus an onboard remote sensor

• Thermally monitored closed-loop fan control, for all onboard fans, that can adjust

fan speed or switch the fans off as needed

18

Desktop Board Features

Chassis Intrusion Detection

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 1, S on
page 11 for the location of the cha

ssis intrusion header.

Power Management Features

Power management is implemented at several levels, including:

• Software support through the Advanced Configuration and Power Interface (ACPI)

• Hardware support:

― Power connectors

― Fan headers

― LAN wake capabilities

― Instantly Available PC technology (Suspend to RAM)

― +5 V standby power indicator LED

― Wake from USB

― Wake from PS/2 keyboard/mouse

― Power Management Event signal (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.

Hardware Support

Power Connectors

ATX12V-compliant power supplies can turn off the computer power through system
control. When an ACPI-enabled computer receives the correct command, the power
supply removes all non-standby voltages.

When resuming from an AC power failure, the computer returns to the power state it
was in before power was interrupted (either on or off). The computer’s response can
be set by using the Last Power State feature in the BIOS Setup program’s Boot menu.

The desktop board has two power connectors. See Figure 22 on page 45 for the
location of the power co

nnectors

.

19

Intel Desktop Board D945GCPE Product Guide

Fan Headers

The function/operation of the fans is as follows:

• The fans are on when the computer is in the ACPI S0 or S1 state.

• The fans are off when the computer is in the ACPI S3, S4, or S5 state.

• Each fan header is wired to a tachometer input of the hardware monitoring and

control device.

• All fan headers support closed-loop fan control that can adjust the fan speed or

switch the fan on or off as needed.

• All fan headers have a +12 V dc connection.
The desktop board has a 4-pin processor fan header and a 3-pin chassis fan header.

LAN Wake Capabilities

CAUTION

For LAN wake capabilities, 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.

LAN wakeup capabilities enable remote wake-up of the computer through a network.
The LAN subsystem monitors network traffic and upon detecting a Magic Packet*
frame, it asserts a wake-up signal that powers up the computer.

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-to­RAM) sleep state. While in the S3 sleep state, the computer will appear to be off. If
the computer has a dual-colored power LED on the front panel, the sleep state is
indicated by the LED turning amber. When signaled by a wake-up device or event, the
computer quickly returns to its last known awake state.

The desktop board supports the PCI Bus Power Management Interface Specification.
Add-in cards that support this specification can participate in power management and
can be used to wake the computer.

20