INTEL D946GZIS Product Guide

Intel® Desktop Board D946GZIS Product Guide

Order Number: D55579-002

Revision History

Revision Revision History Date

001 First release of the Intel® Desktop Board D946GZIS Product Guide June 2006 002 Second release of the Intel® Desktop Board D946GZIS Product Guide October 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 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 D946GZIS 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.

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 D946GZIS.

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 and Indicators: information about BIOS error messages and beep

codes B Regulatory Compliance: 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.

iii

Intel Desktop Board D946GZIS 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 D946GZIS

• I/O shield

• One diskette drive cable

• One ATA-66/100 cable

• Two locking Serial ATA cables

• Intel

• Quick Reference poster

• Configuration and battery caution statement label

Express Installer CD-ROM

1 Desktop Board Features

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

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

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

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

Intel

946GZ 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 and PCI Express* 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

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

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

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

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

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

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

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

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

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

Speaker .............................................................................................................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

Intel Desktop Board D946GZIS Product Guide

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

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

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......................................................................................... 35

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 (SATA) Cable ................................................................ 39

Connecting to Internal Headers.............................................................................40

Installing a Front Panel Audio Solution for Intel

High Definition Audio ............... 41

Connecting to the USB 2.0 Headers ............................................................... 42

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

Connecting to the Alternate Front Panel Power LED Header............................... 43

Connecting to the HD Audio Link Header ........................................................ 43

Connecting to the Flexible Audio System ................................................................ 44

Connecting Chassis Fan and Power Cables.............................................................. 45

Connecting Chassis Fan Cables...................................................................... 45

Connecting Power Cables.............................................................................. 46

Other Connectors and Headers ............................................................................. 47

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

Clearing Passwords..............................................................................................50

Back Panel Connectors......................................................................................... 51

3 Updating the BIOS

Updating the BIOS with the Intel Updating the BIOS with the ISO Image BIOS Update File or the Iflash Memory

Update Utility ................................................................................................

Obtaining the BIOS Update File .....................................................................58

Updating the BIOS with the ISO Image BIOS Update File.................................. 58

Updating the BIOS with Iflash .......................................................................59

Recovering the BIOS....................................................................................60

Express BIOS Update Utility .................................57

A Error Messages and Indicators

BIOS Beep Codes ................................................................................................61

BIOS Error Messages ...........................................................................................61

B Regulatory Compliance

Safety Regulations ..............................................................................................63

Place Battery Marking ..................................................................................63

European Union Declaration of Conformity Statement .............................................. 64

Product Ecology Statements .................................................................................65

Lead-Free Desktop Board .............................................................................68

EMC Regulations ................................................................................................. 69

Ensure Electromagnetic Compatibility (EMC) Compliance .................................. 70

Product Certifications........................................................................................... 71

Board-Level Certification Markings ................................................................. 71

Chassis and Component Certifications ............................................................ 72

Contents

Figures

1. Desktop Board D946GZIS Components ............................................................ 11

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

3. Location of Standby Power Indicator ................................................................ 21

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

5. Desktop Board D946GZIS 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. Installing a PCI Express x16 Card .................................................................... 36

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

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

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

20. Internal Headers ...........................................................................................40

21. Back Panel Audio Connectors ..........................................................................44

22. Location of Chassis Fan Headers...................................................................... 45

23. Connecting Power Supply Cables ..................................................................... 46

24. Location of Other Connectors and Headers........................................................ 47

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

26. Back Panel Connectors ................................................................................... 51

27. Removing the Battery .................................................................................... 56

Tables

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

2. Desktop Board D946GZIS Components ............................................................12

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

4. Front Panel Audio Header Signal Names for Intel High Definition Audio................. 41

5. AC ’97 Audio Header Signal Names ..................................................................41

6. USB 2.0 Header Signal Names......................................................................... 42

7. Front Panel Header ........................................................................................42

8. Alternate Front Panel Power LED Header........................................................... 43

9. HD Audio Link Header Signal Names ................................................................43

10. Jumper Settings for the BIOS Setup Program Modes .......................................... 49

11. Beep Codes................................................................................................... 61

12. BIOS Error Messages ..................................................................................... 61

13. Safety Regulations......................................................................................... 63

14. Lead-Free Board Markings ..............................................................................68

15. EMC Regulations............................................................................................ 69

16. Product Certification Markings .........................................................................71

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Intel Desktop Board D946GZIS Product Guide

viii

1 Desktop Board Features

This chapter briefly describes the main features of Intel® Desktop Board D946GZIS. Table 1 summarizes the major features of the desktop board.

Table 1. Feature Summary

Form Factor Processor

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

Chipset

Graphics

Audio • 6-channel (5.1) onboard subsystem, featuring:

Expansion Capabilities

Peripheral Interfaces

microATX 243.84 millimeters (9.60 inches) x 243.84 millimeters (9.60 inches)

Support for an Intel

sockets

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

• Support for up to 4 GB of system memory

946GZ Express Chipset consisting of:

Intel

• Intel

• Intel® 82801GB I/O Controller Hub (ICH7)

• Intel

• PCI Express* graphics card support via a PCI Express x16 connector

• One PCI Express x1 connector

• One PCI Express x16 connector

• Two PCI connectors

• Up to eight USB 2.0 ports

• Four 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 parallel port

• One serial port

• PS/2* keyboard and mouse ports

946GZ Express Chipset Graphics and Memory Controller Hub

(GMCH)

946GZ Express Chipset with Intel® Graphics Media Accelerator 3000

(Intel

― Intel ― SigmaTel* STAC9227 audio codec ― HD Audio Link header

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

channel

GMA 3000)

High Definition Audio interface

processor in the LGA775 package

continued

Intel Desktop Board D946GZIS Product Guide

Table 1. Feature Summary (continued)

LAN Support

BIOS

Power Management

Hardware Management

10/100 Mb/s) LAN subsystem using the Intel Connect (PLC) device

• Intel

• Support for ACPI, Plug and Play, and SMBIOS

• Support for Advanced Configuration and Power Interface (ACPI)

• Suspend to RAM (STR)

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

• Three fan headers

• Three fan sensing inputs used to monitor fan activity

• Remote diode temperature sensing

• Voltage sensing to detect out of range values

• Intel

BIOS (resident in the SPI Flash device)

Precision Cooling Technology

82562G Platform LAN

Related Links:

For more information about Desktop Board D946GZIS, 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 Edition

• Microsoft Windows 2000

Desktop Board Features

Desktop Board Components

Figure 1 shows the approximate location of the major components on Desktop Board D946GZIS.

Figure 1. Desktop Board D946GZIS Components

Intel Desktop Board D946GZIS Product Guide

Table 2. Desktop Board D946GZIS Components

Label Description

A HD Audio Link header B PCI bus connector 2 C Front panel audio header D PCI bus connector 1 E PCI Express x1 connector F PCI Express x16 connector G Back panel connectors H 12 V processor core voltage connector (2 x 2 pin ) I Rear chassis fan header (3-pin) J Processor socket K Processor fan header (4-pin) L DIMM 0 Channel A socket M DIMM 0, Channel B socket N Main power connector (2 x 12 pin) O Diskette drive connector P IDE connector Q Battery R Front chassis fan header (3-pin) S Chassis intrusion header T Alternate front panel power LED header U Front panel header V Serial ATA connectors W Hi-speed USB 2.0 headers X Speaker Y BIOS configuration jumper block

Related Links:

Go to the following links for more information about:

• Desktop Board D946GZIS

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

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 D946GZIS 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 D946GZIS 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

27 in Chapter 2

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 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

⎯ DIMM Type and Timings listed below:

Type Timing DDR2-667 5-5-5 only DDR2-533 4-4-4 only

― Serial Presence Detect (SPD) memory only ― Memory configurations listed below:

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

• Up to 4.0 GB utilizing 1 Gb technology

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

http://www.cmtlabs.com/mbsearch.asp or http://www.intel.com/products/motherboard/index.htm?iid=HMPAGE+Header_2_Product_MB

Intel Desktop Board D946GZIS Product Guide

Related Links:

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

• SDRAM specifications,

• Installing memory, page

http://www.intel.com/technology/memory/

32 in Chapter 2

Intel® 946GZ Express Chipset

The Intel 946GZ Express Chipset consists of the following devices:

• Intel 946GZ Express Chipset Graphics and Memory Controller Hub (GMCH)

• Intel 82801GB I/O Controller Hub (ICH7)

The Intel 946GZ Express Chipset contains two separate, mutually exclusive graphics options. Either the integrated GMA 3000 graphics controller is used or a PCI Express x16 add-in card can be used. When a PCI Express x16 add-in card is installed, the GMA 3000 graphics controller is disabled.

NOTE

A minimum of 512 MB of system memory is required in order for the Intel GMA 3000 integrated graphics controller to operate properly.

Onboard Audio Subsystem

Desktop Board D946GZIS has a flexible 6-channel (5.1) onboard audio subsystem that includes a SigmaTel STAC9227 audio codec and an HD Audio Link header.

The audio subsystem features:

• Intel

• Advanced jack sense, for the back panel connectors, that enables the audio codec

to recognize the device that is connected to an audio port and retask the connector via the audio driver.

• 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 ― Microphone in

High Definition Audio interface

Desktop Board Features

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

drivers:

― Line in/retasking jack ― Line out/retasking jack ― Mic in/retasking jack

Related Links:

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

• Audio drivers and utilities

• Installing the front panel audio solution, page

• The location of audio connectors,

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

Figure 21 on page 44

Input/Output (I/O) Controller

The super I/O controller features the following:

• 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 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 consists of the following:

• Intel

connectivity

• RJ-45 connector with status indicator LEDs

LAN Subsystem Software

For LAN software and drivers, refer to the D946GZIS link on Intel’s World Wide Web site at:

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

82562G Platform LAN Connect (PLC) device for 10/100 Mb/s Ethernet LAN

Intel Desktop Board D946GZIS 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 status of the LAN.

Figure 2. LAN Connector LEDs

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

Green

Yellow

Off LAN link is not established. On LAN link is established. Blinking LAN activity is occurring. Off 10 Mb/s data rate B 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 fullspeed 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.

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 four Serial ATA channels (3.0 Gb/s) via ICH7, connecting one device per channel.

Expandability

For system expansion, the desktop board provides the following:

• One PCI Express x16 connector

• One PCI Express x1 connector

• Two PCI bus connectors

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 a Serial Peripheral Interface (SPI) Flash device.

The BIOS can be updated by following the instructions on page

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.

56 in Chapter 3.

Intel Desktop Board D946GZIS Product Guide

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.

Related Links:

For instructions on resetting the password, see

Clearing Passwords on page 50.

Hardware Management Features

The hardware management features of Desktop Board D946GZIS enable the board to be compatible with the Wired for Management (WfM) specification. 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

• Intel

• 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

Precision Cooling Technology

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 page

47 for the location of the chassis intrusion header.

Figure 24 on

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 ― WAKE# signal wake-up 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

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 location of the power connectors.

Figure 23 on page 46 for the

Intel Desktop Board D946GZIS 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 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 two 3-pin chassis fan

headers.

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.

Desktop Board Features

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.

+5 V Standby Power Indicator LED

CAUTION

If the AC power has been switched off and the standby power indicator is still lit, disconnect the power cord before installing or removing any devices connected to the board. Failure to do so could damage the board and any attached devices.

The desktop board’s standby power indicator, shown in Figure 3, is lit when there is standby power still present on the board even when the computer appears to be off. For example, when this LED is lit, standby power is still present at the memory module sockets and the PCI bus connectors.

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/

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 S3 state.

Wake from PS/2 Keyboard/Mouse

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

Intel Desktop Board D946GZIS Product Guide

PME# Signal Wake-up Support

When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S3, S4, or S5 state.

WAKE# Signal Wake-up Support

When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from an ACPI S2, S3, S4, 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. Go to page battery.

52 for instructions on how to replace the

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.

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