Intel D925XHY, 925 - Pentium D 925 3.0GHz 800MHz 4MB-Cache Socket 775 CPU Product Manual

Intel® Desktop Board D925XHY Product Guide

Order Number: D44269-001

Revision History

Revision Revision History Date

-001

If an FCC declaration of conformity marking is present on the board, the following statement applies:

First release of the Intel

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.

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 D925XHY 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.

Desktop Board D925XHY Product Guide.

January 2006

Preface

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

Desktop Board D925XHY.

Intended Audience

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

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 BIOS: information about entering BIOS Setup and how to update the BIOS.

• 4 Desktop Board Resources: information about connectors and desktop board resources.

• A Error Messages and Indicators: information about BIOS error messages and beep codes.

• B Regulatory Compliance: safety and EMC regulations, product certification.

Conventions

The following conventions are used in this manual:

WARNING

Warnings indicate conditions that, if not observed, can cause personal injury.

CAUTION

Cautions warn the user about how to prevent damage to hardware or loss of data.

NOTE

Notes call attention to important information.

iii

Intel Desktop Board D925XHY Product Guide

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

• NVIDIA* GeForce* 6200 LE Graphics Card

• I/O shield

• One ATA-66/100 cable

• Four Serial ATA cables

• Two Serial ATA power cables

• One diskette drive cable

• Intel

• Floppy disk with RAID driver

• Back panel audio covers

• Quick Reference Guide

• Configuration and battery caution statement label

Express Installer CD-ROM

Contents

1 Desktop Board Features

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

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

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

Main Memory ........................................................................................................................ 14

Intel® 925X Express Chipset.................................................................................................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......................................................................................................................... 17

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

Serial ATA and IDE Auto Configuration ....................................................................... 18

PCI and PCI Express Auto Configuration ....................................................................18

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

Chassis Intrusion...................................................................................................................18

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

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

Fan Connectors............................................................................................................ 19

Fan Speed Control (Intel® Precision Cooling Technology) .......................................... 19

Suspend to RAM (Instantly Available PC Technology) ................................................ 19

Resume on Ring ..........................................................................................................20

Wake from USB ...........................................................................................................21

Wake from PS/2 Keyboard/Mouse...............................................................................21

PME# Wakeup Support................................................................................................ 21

Speaker................................................................................................................................. 21

Battery................................................................................................................................... 21

Real-Time Clock....................................................................................................................21

2 Installing 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

Use Only for Intended Applications..............................................................................26

Installing the I/O Shield ......................................................................................................... 26

Installing and Removing the Desktop Board ......................................................................... 27

Installing and Removing a Processor.................................................................................... 28

Intel Desktop Board D925XHY Product Guide

Installing a Processor...................................................................................................28

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

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

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

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

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

Removing DIMMs......................................................................................................... 36

Installing and Removing a PCI Express x16 Card ................................................................ 36

Installing a PCI Express x16 Card ...............................................................................36

Removing the PCI Express x16 Card ..........................................................................37

Connecting the IDE Cable..................................................................................................... 38

Connecting the Serial ATA Cable .........................................................................................39

Configuring the System for Intel® Matrix Storage Technology for Serial ATA....................... 40

Configuring the BIOS for Intel Matrix Storage Technology .......................................... 40

Creating Your RAID Set ............................................................................................... 40

Loading the Intel® Application Accelerator Drivers....................................................... 40

Setting Up a “RAID Ready” System ............................................................................. 40

Connecting Internal Headers ................................................................................................41

Front Panel Audio Header............................................................................................ 42

IEEE 1394 Headers .....................................................................................................42

USB 2.0 Headers ......................................................................................................... 42

Front Panel Header......................................................................................................43

Alternate Power LED Header.......................................................................................43

Chassis Intrusion Header.............................................................................................43

Connecting Fans...................................................................................................................44

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

Installing Other Connectors................................................................................................... 47

Setting the BIOS Configuration Jumper Block ...................................................................... 48

Clearing Passwords ..............................................................................................................49

Back Panel Connectors......................................................................................................... 50

Setting Up Full 7.1-Channel Surround Sound (Optional) ...................................................... 51

Multi-Channel Analog Audio......................................................................................... 51

Multi-Channel Digital Audio..........................................................................................51

Replacing the Battery............................................................................................................ 52

3 BIOS

Updating the BIOS ................................................................................................................ 57

Updating the BIOS with the Intel® Express BIOS Update Utility .................................. 57

Updating the BIOS with the Iflash Memory Update Utility............................................57

4 Desktop Board Resources

Memory Map ......................................................................................................................... 61

DMA Channels......................................................................................................................61

Interrupts...............................................................................................................................62

A Error Messages and Indicators

BIOS Beep Codes.................................................................................................................63

BIOS Error Messages ........................................................................................................... 63

B Regulatory Compliance

Safety Regulations................................................................................................................65

European Union Declaration of Conformity Statement ......................................................... 65

Product Ecology Statements................................................................................................. 66

EMC Regulations .................................................................................................................. 67

Product Certification Markings (Board Level)........................................................................ 68

Figures

1. Desktop Board D925XHY Components .........................................................................11

2. Location of Standby Power Indicator.............................................................................. 20

3. Installing the I/O Shield................................................................................................... 26

4. Location of Desktop Board Mounting Holes ................................................................... 27

5. Lift Socket Lever............................................................................................................. 28

6. Lift the Load Plate and Don’t Touch the Socket Contacts .............................................. 28

7. Remove the Protective Socket Cover............................................................................. 29

8. Remove the Processor from the Protective Processor Cover/Do Not Touch................. 29

9. Install Processor............................................................................................................. 30

10. Close the Load Plate ...................................................................................................... 30

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

12. Dual Configuration Example 1........................................................................................ 32

13. Dual Configuration Example 2........................................................................................ 32

14. Dual Configuration Example 3........................................................................................ 33

15. Use DDR2 DIMMs .......................................................................................................... 34

16. Installing a DIMM............................................................................................................ 35

17. Removing the PCI Express x16 Card ............................................................................. 37

18. Connecting the IDE Cable .............................................................................................. 38

19. Connecting the Serial ATA Cable................................................................................... 39

20. Internal Headers............................................................................................................. 41

21. Location of Fan Headers ................................................................................................ 44

22. Connecting 2x10 Power Supply Cables .........................................................................45

23. Connecting 2x12 Power Supply Cables .........................................................................46

24. Location of Other Connectors......................................................................................... 47

25. Location of the BIOS Configuration Jumper Block .........................................................48

26. Back Panel Connectors.................................................................................................. 50

27. Back Panel Audio Connectors........................................................................................ 51

28. Removing the Battery ..................................................................................................... 55

Contents

vii

Intel Desktop Board D925XHY Product Guide

Tables

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

2. Desktop Board D925XHY Components .........................................................................12

3. Memory Configurations ..................................................................................................14

4. RJ-45 10/100 Ethernet LAN Connector LEDs ................................................................ 16

5. Front Panel Audio Header Signal Names....................................................................... 42

6. IEEE 1394 Header Signal Names .................................................................................. 42

7. USB 2.0 Header Signal Names ...................................................................................... 42

8. Front Panel Header Signal Names................................................................................. 43

9. Jumper Settings for the BIOS Setup Program Modes.................................................... 48

10. System Memory Map...................................................................................................... 61

11. DMA Channels ............................................................................................................... 61

12. Interrupts ........................................................................................................................62

13. Beep Codes.................................................................................................................... 63

14. BIOS Error Messages..................................................................................................... 63

15. Safety Regulations ......................................................................................................... 65

16. EMC Regulations............................................................................................................ 67

17. Product Certification Markings........................................................................................ 68

viii

1 Desktop Board Features

This chapter briefly describes the main features of Intel® Desktop Board D925XHY.

Table 1 summarizes the major features of the desktop board.

Table 1. Feature Summary

Form Factor

Processor

Main Memory

Chipset

Audio

Expansion Capabilities

LAN Subsystem

BIOS

RAID

ATX (11.8875” x 9.60”) Intel Desktop Board D925XHY

Support for an Intel 533 MHz front side bus

• Four 240-pin, 1.8 V SDRAM Dual Inline Memory Module (DIMM) sockets

• 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/

925X Express Chipset consisting of:

Intel

82925X Memory Controller Hub (MCH) with Direct Media Interface

• Intel

82801FR I/O Controller Hub (ICH6-R) supporting Intel® Matrix Storage

• Intel Technology

• Intel 925X Express Chipset

• Intel® High Definition Audio codec

• Four PCI bus add-in card connectors

• One PCI Express x16 connector

• Two PCI Express x1 connectors

• Four Serial ATA (SATA) connectors

• Two front panel USB 2.0 headers

• One front panel audio header

• Two IEEE 1394 headers

10/100 Mbit/sec Ethernet Controller with RJ-45 connector

BIOS

• Intel

• 8 Mbit symmetrical flash memory

• Support for SMBIOS

Rapid BIOS Boot

• Intel

Express BIOS Update

Matrix Storage Technology for Serial ATA

Intel

Pentium® 4 processor in the LGA775 package with 800 MHz or

continued

Intel Desktop Board D925XHY Product Guide

Table 1. Feature Summary (continued)

Peripheral Interfaces

Power Management

Hardware Management

• Up to eight USB 2.0 ports

⎯ Four ports routed to the back panel

⎯ Four ports routed to two USB headers

• Four Serial ATA channels, via the ICH6-R, one device per channel

• Up to three IEEE 1394 ports

⎯ One port routed to the back panel

⎯ Two ports routed to two IEEE 1394 headers

• One IDE interface with ATA-66/100 support

• One diskette drive interface

• One parallel port

• One serial port

• PS/2* keyboard and mouse ports

• 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 monitor with:

• Four fan sensing inputs used to monitor fan activity

• Remote diode temperature sensing

• Intel

Precision Cooling Technology fan speed control that automatically adjusts processor fan speeds based on processor temperature and chassis fan speeds based on system temperature

• Voltage sensing to detect out of range values

Related Links

For more information about Intel Desktop Board D925XHY, 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* XP Media Center Edition 2005

• Microsoft Windows XP Professional

• Microsoft Windows XP Professional x64 Edition

• Microsoft Windows XP Home

• Microsoft Windows 2000

Desktop Board Features

Desktop Board Components

Figure 1 shows the approximate location of the major components on Desktop Board D925XHY.

Line In

IEEE

1394

RJ45

Optical Line Out

(Toslink)

Co-axial Line Out

U T

Intel

82925X

(MCH)

Intel

Channel A

82801FR

(ICH6-R)

Channel B

DIMM 0

DIMM 1

DIMM 0

DIMM 1

Figure 1. Desktop Board D925XHY Components

OM19120

Intel Desktop Board D925XHY Product Guide

Table 2. Desktop Board D925XHY Components

Label Description

A PCI Express x1 connectors

B Front panel audio header (yellow)

C PCI Express x16 connector

D Rear chassis fan header (fan speed control)

E Alternate power connector (1x4)

F 12 V power connector (2x2)

G Processor socket (LGA775)

H Processor fan header (4-pin, fan speed control)

I Main power connector (2x12)

J Diskette drive connector

K IDE connector

L Battery

M Chassis intrusion header

N BIOS configuration jumper

O Front chassis fan header (fan speed control)

P Serial ATA connectors (four)

Q Alternate power LED header

R Front panel header

S USB 2.0 headers

T IEEE 1394 headers (blue)

U Speaker

V PCI bus add-in card connectors

W Auxiliary rear fan header (4-pin, fan speed control)

Related Links

Go to the following links for more information about:

• Intel Desktop Board D925XHY

• Supported processors

• Audio software and utilities

• LAN software and drivers

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

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

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

Desktop Board Features

Processor

NOTE

Failure to use an ATX12V power supply or not connecting the 12 V (2x2) power connector to Desktop Board D925XHY may result in the computer not booting.

Desktop Board D925XHY supports a single Intel Pentium 4 processor in the LGA775 package. Processors are not included with the desktop board and must be purchased separately.

The processor connects to the Intel desktop board through the LGA775 socket.

The supported processors list for Desktop Board D925XHY 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 45 in Chapter 2

Intel Desktop Board D925XHY Product Guide

Main Memory

NOTE

To be fully compliant with all applicable Intel® SDRAM memory specifications, the desktop 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 3.

Table 3. Memory Configurations

Memory Speed Processor FSB frequency (MHz) Memory Speed Outcome (MHz)

800 533 DDR2 533 Pentium 4 processor

533 533

800 400 DDR2 400 Pentium 4 processor

533 333

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

connectors with gold-plated contacts.

• Support for: ⎯ Unbuffered, non-registered single or double-sided DIMMs ⎯ Serial Presence Detect (SPD) memory only ⎯ 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/pcsdram/spec/

• Installing memory, page 32 in Chapter 2

Desktop Board Features

Intel® 925X Express Chipset

The Intel 925X Express Chipset consists of the following devices:

• Intel 82925X Memory Controller Hub (MCH) with Direct Media Interface

• Intel 82801FR I/O Controller Hub (ICH6-R)

Related Links

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

• Audio drivers and utilities http://support.intel.com/support/motherboards/desktop/

• The location of back panel audio connectors, page 51 in Chapter 2

Intel Desktop Board D925XHY Product Guide

Input/Output (I/O) Controller

The super I/O controller features the following:

• Low pin count (LPC) interface

• One serial port

• One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port

(EPP) support

• Serial IRQ interface compatible with serialized IRQ support for PCI systems

• PS/2-style mouse and keyboard interfaces

• Interface for one 1.2 MB, 1.44 MB, or 2.88 MB diskette drive

• Intelligent power management, including a programmable wake up event interface

• PCI power management support

LAN Subsystem

The LAN, with the Intel 82801FR, provides a Fast PCI LAN subsystem. The LAN subsystem provides the following functions:

• Marvell 10/100 Ethernet LAN

• 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 D925XHY link on Intel’s World Wide Web site at:

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

RJ-45 LAN Connector LEDs

Table 4 describes the LED states when the board is powered up and the 10/100 Ethernet LAN subsystem is operating.

Table 4. RJ-45 10/100 Ethernet LAN Connector LEDs

LED LED State Indicates

Off LAN link is not established Green

On LAN link is established

Blinking LAN activity is occurring

Off 10 Mbits/sec data rate is selected Yellow

On (steady state) 100 Mbits/sec data rate is selected

Desktop Board Features

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 ICH6-R; 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 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 ICH6-R’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

Serial ATA

The desktop board supports four Serial ATA channels via the ICH6-R, connecting one device per channel in either a RAID or non-RAID configuration.

Expandability

The desktop board supports the following:

• One PCI Express x16 add-in card

• Two PCI Express x1 add-in cards

• Four PCI bus add-in cards

Related Links

For information about installing the 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 and IDE auto-configuration utilities, and the video BIOS.

See Chapter 3 on page 57 for more information about the BIOS.

Intel Desktop Board D925XHY Product Guide

Serial ATA and IDE Auto Configuration

If you install a Serial ATA or IDE device (such as a hard drive) in your desktop board, the autoconfiguration 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.

When booting from a Serial ATA device, Serial ATA connector 0 is the first boot device and Serial ATA connector 3 is the last boot device.

PCI and PCI Express Auto Configuration

If you install a PCI/PCI Express add-in card in your desktop board, the PCI/PCI Express autoconfiguration 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.

Chassis Intrusion

The desktop 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 41 for the location of the chassis intrusion header.

Desktop Board Features

Power Management Features

Power management is implemented at several levels, including:

• Advanced Configuration and Power Interface (ACPI)

• Hardware support: ⎯ Fan connectors ⎯ Suspend to RAM (Instantly Available PC technology) ⎯ Resume on Ring ⎯ 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.

Fan Connectors

Desktop Board D925XHY has three chassis fan headers (two 3-pin and one 4-pin) and one processor fan header (4-pin).

See Figure 21 on page 44 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 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 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)

CAUTION

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.

Intel Desktop Board D925XHY Product Guide

CAUTION

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 2, 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.

OM19121

Figure 2. Location of Standby Power Indicator

Related Links

For more information on standby current requirements for the desktop board, go to the link below, select the desktop board name, and then select Technical Documentation:

http://developer.intel.com/design/motherbd/

Resume on Ring

The operation of Resume on Ring can be summarized as follows:

• Resumes operation from either ACPI S1 or ACPI S3 state

• Requires only one call to access the computer

• Detects incoming call similarly for external and internal modems

• Requires modem interrupt be unmasked for correct operation

Desktop Board Features

Wake from USB

NOTE

Wake from USB requires the use of a USB peripheral that supports Wake from USB.

USB bus activity wakes the computer from an ACPI S1 or S3 state.

Wake from PS/2 Keyboard/Mouse

PS/2 keyboard/mouse activity wakes the computer from an ACPI S1 or S3 state.

PME# Wakeup Support

When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, or S5 state.

Speaker

A speaker is mounted on the desktop board. The speaker provides audible error code (beep code) information during the Power-On Self-Test (POST).

Battery

A battery on the desktop board keeps the values in CMOS RAM and the clock current when the computer is turned off. See Chapter 2 starting on page 23 for instructions on how to replace the battery.

Real-Time Clock

The desktop board has a time-of-day clock and 100-year calendar. The battery on the desktop board keeps the clock current when the computer is turned off.

+ 47 hidden pages

Intel D925XHY, 925 - Pentium D 925 3.0GHz 800MHz 4MB-Cache Socket 775 CPU Product Manual

Specifications and Main Features

Frequently Asked Questions

User Manual