Intel DESKTOP BOARD D955XBK Manual

Intel DESKTOP BOARD D955XBK Manual

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Intel
D955XBK

Technical Product Specification

®
The Intel
Desktop Board D955XBK may contain design defects or errors known as errata that may cause the product to deviate from published specifications. Current
characterized errata are documented in the Intel Desktop Board D955XBK Specification Update.
®
Desktop Board
April 2005
Order Number: D14065-001

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Summary of Contents for Intel DESKTOP BOARD D955XBK

  • Page 1: Technical Product Specification

    Order Number: D14065-001 ® The Intel Desktop Board D955XBK may contain design defects or errors known as errata that may cause the product to deviate from published specifications. Current characterized errata are documented in the Intel Desktop Board D955XBK Specification Update.
  • Page 2: Revision History

    Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be obtained from: Intel Corporation P.O.
  • Page 3: Intended Audience

    Intended Audience The TPS is intended to provide detailed, technical information about the Intel Desktop Board D955XBK and its components to the vendors, system integrators, and other engineers and technicians who need this level of information. It is specifically not intended for general audiences.
  • Page 4 When used in the description of a component, N indicates component type, xn are the relative coordinates of its location on the Desktop Board D955XBK, and X is the instance of the particular part at that general location. For example, J5J1 is a connector, located at 5J. It is the first connector in the 5J area.
  • Page 5: Table Of Contents

    Block Diagram ....................14 Online Support ......................15 Processor ........................15 System Memory ......................16 1.4.1 Memory Configurations ................. 17 ® Intel 955X Chipset...................... 21 1.5.1 USB ....................... 21 1.5.2 IDE Support ....................21 1.5.3 Real-Time Clock, CMOS SRAM, and Battery..........23 Discrete Serial ATA Interface (Optional) ..............
  • Page 6 Intel Desktop Board D955XBK Technical Product Specification 2 Technical Reference Memory Resources ...................... 45 2.1.1 Addressable Memory..................45 2.1.2 Memory Map....................47 DMA Channels ......................47 Fixed I/O Map....................... 48 PCI Configuration Space Map..................49 Interrupts ........................50 PCI Conventional Interrupt Routing Map ..............51 Connectors........................
  • Page 7 Fast Booting Systems with Intel Rapid BIOS Boot............. 86 3.7.1 Peripheral Selection and Configuration ............86 3.7.2 Intel Rapid BIOS Boot ................... 86 BIOS Security Features ....................87 4 Error Messages and Beep Codes Speaker ........................89 BIOS Beep Codes......................89 BIOS Error Messages ....................
  • Page 8 Intel Desktop Board D955XBK Technical Product Specification LAN Connector LED States ..................31 Effects of Pressing the Power Switch ................37 Power States and Targeted System Power ..............38 Wake-up Devices and Events ..................39 System Memory Map ....................47 DMA Channels ......................
  • Page 9 Overview ........................10 Online Support ......................15 Processor ........................15 System Memory ......................16 ® Intel 955X Chipset...................... 21 Discrete Serial ATA Interface (Optional) ..............24 PCI Express Connectors....................24 Auxiliary Power (AUX PWR) Output Connector (Optional) .......... 25 IEEE-1394a/b Connectors (Optional)................25 1.10 I/O Controller........................
  • Page 10: Overview

    Intel Desktop Board D955XBK Technical Product Specification 1.1 Overview 1.1.1 Feature Summary Table 1 summarizes the major features of the board. Table 1. Feature Summary Form Factor ATX (12.00 inches by 9.60 inches [304.80 millimeters by 243.84 millimeters]) ® ®...
  • Page 11: Manufacturing Options

    • Fan speed control 1.1.2 Manufacturing Options Table 2 describes the manufacturing options. Not every manufacturing option is available in all marketing channels. Please contact your Intel representative to determine which manufacturing options are available to you. Table 2. Manufacturing Options...
  • Page 12: Board Layout

    Intel Desktop Board D955XBK Technical Product Specification 1.1.3 Board Layout Figure 1 shows the location of the major components. GG EE CC OM17719 Figure 1. Desktop Board Components Table 3 lists the components identified in Figure 1.
  • Page 13: Components Shown In Figure 1

    Alternate power connector (optional) Rear chassis fan connector LGA775 processor socket Intel 82955X MCH Processor fan connector Intel 82801GR I/O Controller Hub (ICH7-R) DIMM Channel A sockets [2] DIMM Channel B sockets [2] I/O controller Power connector Diskette drive connector...
  • Page 14: Block Diagram

    Intel Desktop Board D955XBK Technical Product Specification 1.1.4 Block Diagram Figure 2 is a block diagram of the major functional areas of the board. Gigabit Ethernet PCI Express Interface Controller Connector PCI Express x1 Slot SMBus Back Panel/Front Panel Secondary PCI...
  • Page 15: Online Support

    1.3 Processor The board is designed to support Intel Pentium 4 processors in an LGA775 processor socket with a 1066 or 800 MHz system bus. See the Intel web site listed below for the most up-to-date list of supported processors.
  • Page 16: System Memory

    Intel Desktop Board D955XBK Technical Product Specification 1.4 System Memory The board has four DIMM sockets and supports the following memory features: • 1.8 V and 1.9 V DDR2 SDRAM DIMMs • Unbuffered, single-sided or double-sided DIMMs with the following restriction: Double-sided DIMMS with x16 organization are not supported.
  • Page 17: Memory Configurations

    Product Description 1.4.1 Memory Configurations The Intel 82955X MCH supports two types of memory organization: • Dual channel (Interleaved) mode. This mode offers the highest throughput for real world applications. Dual channel mode is enabled when the installed memory capacities of both DIMM channels are equal.
  • Page 18: Dual Channel (Interleaved) Mode Configuration With Two Dimms

    Intel Desktop Board D955XBK Technical Product Specification 1.4.1.1 Dual Channel (Interleaved) Mode Configurations Figure 4 shows a dual channel configuration using two DIMMs. In this example, the DIMM0 (blue) sockets of both channels are populated with identical DIMMs. Channel A, DIMM 0...
  • Page 19: Dual Channel (Interleaved) Mode Configuration With Four Dimms

    Product Description Figure 6 shows a dual channel configuration using four DIMMs. In this example, the combined capacity of the two DIMMs in Channel A equal the combined capacity of the two DIMMs in Channel B. Also, the DIMMs are matched between DIMM0 and DIMM1 of both channels. Channel A, DIMM 0 256 MB 512 MB...
  • Page 20: Single Channel (Asymmetric) Mode Configuration With One Dimm

    Intel Desktop Board D955XBK Technical Product Specification 1.4.1.2 Single Channel (Asymmetric) Mode Configurations NOTE Dual channel (Interleaved) mode configurations provide the highest memory throughput. Figure 7 shows a single channel configuration using one DIMM. In this example, only the DIMM0 (blue) socket of Channel A is populated.
  • Page 21: Intel ® 955X Chipset

    1.5 Intel 955X Chipset The Intel 955X chipset consists of the following devices: • Intel 82955X Memory Controller Hub (MCH) with Direct Media Interface (DMI) interconnect • Intel 82801GR I/O Controller Hub (ICH7-R) with DMI interconnect • BIOS storage in one of the following: ⎯...
  • Page 22 Intel Desktop Board D955XBK Technical Product Specification • Ultra DMA: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 33 MB/sec. • ATA-66: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 66 MB/sec.
  • Page 23: Real-Time Clock, Cmos Sram, And Battery

    Product Description 1.5.2.3 Serial ATA RAID The ICH7-R supports the following RAID (Redundant Array of Independent Drives) levels: • RAID 0 - data striping. Multiple physical drives can be teamed together to create one logical drive. As data is written or retrieved from the logical drive, both drives operate in parallel, thus increasing the throughput.
  • Page 24: Discrete Serial Ata Interface (Optional)

    Intel Desktop Board D955XBK Technical Product Specification 1.6 Discrete Serial ATA Interface (Optional) As a manufacturing option, the board provides a Silicon Image Sil 3114 Serial ATA (SATA) controller and four connectors (that support one device per connector) for SATA devices. These connectors are in addition to the four SATA connectors of the ICH7-R SATA interface.
  • Page 25: Auxiliary Power (Aux Pwr) Output Connector (Optional)

    Product Description 1.8 Auxiliary Power (AUX PWR) Output Connector (Optional) The D955XBK board includes a 1x4 power connector that can be used to provide power for internal chassis lighting or additional fans. The on/off function of this connector is controlled from within the BIOS Setup Program.
  • Page 26: I/O Controller

    Intel Desktop Board D955XBK Technical Product Specification For information about Refer to The location of the back panel IEEE-1394a connector Figure 17, page 54 The location of the front panel IEEE-1394a/b connectors Figure 19, page 56 The signal names of the front panel IEEE-1394a/b connectors Section 2.7.2.6, page 66...
  • Page 27: Audio Subsystem

    The location of the keyboard and mouse connectors Figure 18, page 55 1.11 Audio Subsystem The board supports the Intel High Definition audio subsystem based on the Sigmatel 9221 or the Sigmatel 9220 audio codec. The audio subsystem supports the following features: •...
  • Page 28: 8-Channel (7.1) Audio Subsystem

    Intel Desktop Board D955XBK Technical Product Specification 1.11.3 8-Channel (7.1) Audio Subsystem The 8-channel (7.1) audio subsystem includes the following: • Intel 82801GR I/O Controller Hub (ICH7-R) • Sigmatel 9221 audio codec • Microphone input that supports a single dynamic, condenser, or electret microphone The back panel audio connectors are configurable through the audio device drivers.
  • Page 29: Channel (7.1) Audio Subsystem Block Diagram

    Figure 10 is a block diagram of the 8-channel (7.1) audio subsystem. Front Panel Mic In Front Panel Line Out Mic In/Retasking Jack 82801GR Side Surround L-R/Line In/Retasking Jack Intel I/O Controller Sigmatel 9221 High Definition Line Out/Retasking Jack Audio Codec...
  • Page 30: 6-Channel (5.1) Audio Subsystem

    Intel Desktop Board D955XBK Technical Product Specification 1.11.4 6-Channel (5.1) Audio Subsystem The 6-channel (5.1) audio subsystem includes the following: • Intel 82801GR I/O Controller Hub (ICH7-R) • Sigmatel 9220 audio codec • Microphone input that supports a single dynamic, condenser, or electret microphone The back panel audio connectors are configurable through the audio device drivers.
  • Page 31: Lan Subsystem

    82573 Gigabit (10/100/1000 Mbits/sec) Ethernet Controller and an RJ-45 LAN connector with integrated status LEDs. ® 1.12.1 Intel 82573E/82573V/82574V Gigabit Ethernet Controller The Intel 82573E/82573V/82574V Gigabit Ethernet Controller supports the following features: • PCI Express link • 10/100/1000 IEEE 802.3 compliant •...
  • Page 32: Alert Standard Format (Asf) Support

    Intel AMT enables IT organizations to discover, heal, and protect all of their computing assets, regardless of system state in the manner described below.
  • Page 33 • Protecting the enterprise against malicious software attacks: ⎯ Intel AMT helps IT organizations keep software versions and virus protection consistent and up-to-date across the enterprise ⎯ Version information is stored in non-volatile memory for access anytime by third party software to check and, if necessary, wake a system to perform off-hours updates.
  • Page 34: Lan Subsystem Software

    Intel Desktop Board D955XBK Technical Product Specification 1.12.5 LAN Subsystem Software LAN software and drivers are available from Intel’s World Wide Web site. For information about Refer to Obtaining LAN software and drivers Section 1.2, page 15 1.13 Hardware Management Subsystem The hardware management features enable the board to be compatible with the Wired for Management (WfM) specification.
  • Page 35: Thermal Monitoring

    Product Description 1.13.2 Thermal Monitoring Figure 14 shows the location of the sensors and fan connectors. OM17725 Item Description Remote ambient temperature sensor Thermal diode, located on processor die Ambient temperature sensor, internal to hardware monitoring and fan control ASIC Processor fan connector Rear chassis fan connector Front chassis fan connector...
  • Page 36: Fan Monitoring

    Intel Desktop Board D955XBK Technical Product Specification 1.13.3 Fan Monitoring Fan monitoring can be implemented using Intel Desktop Utilities or third-party software. The level of monitoring and control is dependent on the hardware monitoring ASIC used with the Desktop Board.
  • Page 37: Effects Of Pressing The Power Switch

    Product Description Table 6 lists the system states based on how long the power switch is pressed, depending on how ACPI is configured with an ACPI-aware operating system. Table 6. Effects of Pressing the Power Switch …and the power switch is If the system is in this state…...
  • Page 38: Power States And Targeted System Power

    Intel Desktop Board D955XBK Technical Product Specification Table 7 lists the power states supported by the board along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states. Table 7.
  • Page 39: Hardware Support

    Product Description 1.14.1.2 Wake-up Devices and Events Table 8 lists the devices or specific events that can wake the computer from specific states. Table 8. Wake-up Devices and Events These devices/events can wake up the computer… …from this state (Note) S1, S3, S4, S5 Modem (back panel Serial Port A) S1, S3...
  • Page 40: Power Connector

    Intel Desktop Board D955XBK Technical Product Specification NOTE The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an operating system that provides full ACPI support. 1.14.2.1 Power Connector When an ACPI-enabled system receives the appropriate command, the power supply removes all non-standby voltages.
  • Page 41 Product Description • The onboard LAN subsystem 1.14.2.4 Instantly Available PC Technology CAUTION For Instantly Available PC technology, the +5 V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to provide adequate standby current when implementing Instantly Available PC technology can damage the power supply.
  • Page 42: Location Of The Standby Power Indicator Led

    Intel Desktop Board D955XBK Technical Product Specification 1.14.2.10 +5 V Standby Power Indicator LED The +5 V standby power indicator LED shows that power is still present even when the computer appears to be off. Figure 15 shows the location of the standby power indicator LED on the D955XBK board.
  • Page 43: Trusted Platform Module (Optional)

    TPM protects encryption and signature keys at their most vulnerable stages—operations when the keys are being used unencrypted in plain-text form. The TPM is specifically designed to shield unencrypted keys and platform authentication information from software-based attacks. For information about Refer to http://www.intel.com/design/motherbd/bk/...
  • Page 44 Intel Desktop Board D955XBK Technical Product Specification...
  • Page 45: Technical Reference

    2 Technical Reference What This Chapter Contains Memory Resources ...................... 45 DMA Channels ......................47 Fixed I/O Map....................... 48 PCI Configuration Space Map..................49 Interrupts ........................50 PCI Conventional Interrupt Routing Map ..............51 Connectors........................53 Jumper Block ....................... 67 Mechanical Considerations ..................
  • Page 46: Detailed System Memory Address Map

    Intel Desktop Board D955XBK Technical Product Specification 8 GB Top of System Address Space Upper 4 GB of address space FLASH APIC ~20 MB Reserved PCI Memory Range - contains PCI, chipsets, 1 MB Direct Media Interface 0FFFFFH Upper BIOS...
  • Page 47: Memory Map

    Technical Reference 2.1.2 Memory Map Table 9 lists the system memory map. Table 9. System Memory Map Address Range (decimal) Address Range (hex) Size Description 1024 K - 8388608 K 100000 - 1FFFFFFFF 8191 MB Extended memory 960 K - 1024 K F0000 - FFFFF 64 KB Runtime BIOS...
  • Page 48: Fixed I/O Map

    Address (hex) Size Description 0000 - 00FF 256 bytes Used by the Desktop Board D955XBK. Refer to the ICH7-R data sheet for dynamic addressing information. 0170 - 0177 8 bytes Secondary Parallel ATA IDE channel command block 01F0 - 01F7...
  • Page 49: Pci Configuration Space Map

    Number (hex) Number (hex) Number (hex) Description Memory controller of Intel 82955X component PCI Express x16 graphics port Intel High Definition Audio Controller PCI Express port 1 (PCI Express x1 bus connector 1) PCI Express port 2 (Gigabit Ethernet controller bridge)
  • Page 50: Interrupts

    Intel Desktop Board D955XBK Technical Product Specification 2.5 Interrupts The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the Advanced Programmable Interrupt Controller (APIC) portion of the ICH7-R component. The PIC is supported in Windows 98 SE and Windows ME and uses the first 16 interrupts. The APIC is supported in Windows 2000 and Windows XP and supports a total of 24 interrupts.
  • Page 51: Pci Conventional Interrupt Routing Map

    Technical Reference 2.6 PCI Conventional Interrupt Routing Map This section describes interrupt sharing and how the interrupt signals are connected between the PCI Conventional bus connectors and onboard PCI Conventional devices. The PCI Conventional specification describes how interrupts can be shared between devices attached to the PCI Conventional bus.
  • Page 52: Pci Interrupt Routing Map

    Intel Desktop Board D955XBK Technical Product Specification Table 14. PCI Interrupt Routing Map ICH7-R PIRQ Signal Name PCI Interrupt Source PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH IEEE-1394a/b controller INTA PCI bus connector 1 INTD INTA INTB INTC PCI bus connector 2...
  • Page 53: Connectors

    Technical Reference 2.7 Connectors CAUTION Only the following connectors have overcurrent protection: back panel USB, front panel USB, and PS/2. The other internal connectors are not overcurrent protected and should connect only to devices inside the computer’s chassis, such as fans and internal peripherals. Do not use these connectors to power devices external to the computer’s chassis.
  • Page 54: Back Panel Connectors For 8-Channel (7.1) Audio Subsystem

    Intel Desktop Board D955XBK Technical Product Specification 2.7.1.1 Back Panel Connectors For 8-Channel (7.1) Audio Subsystem Figure 17 shows the location of the back panel connectors for boards equipped with the 8-channel (7.1) audio subsystem. The back panel connectors are color-coded. The figure legend (Table 15) lists the colors used (when applicable).
  • Page 55: Back Panel Connectors For 6-Channel (5.1) Audio Subsystem

    Technical Reference 2.7.1.2 Back Panel Connectors For 6-Channel (5.1) Audio Subsystem Figure 18 shows the location of the back panel connectors for boards equipped with the 6-channel (5.1) audio subsystem. The back panel connectors are color-coded. The figure legend (Table 16) lists the colors used (when applicable).
  • Page 56: Component-Side Connectors

    Intel Desktop Board D955XBK Technical Product Specification 2.7.2 Component-side Connectors Figure 19 shows the locations of the component-side connectors. OM17728 Figure 19. D955XBK Component-side Connectors Table 17 lists the component-side connectors identified in Figure 19.
  • Page 57: Component-Side Connectors Shown In Figure 19

    Technical Reference Table 17. Component-side Connectors Shown in Figure 19 Item/callout from Figure 19 Description PCI Express x1 bus add-in card connector Auxiliary rear fan connector PCI Conventional bus add-in card connector 3 ATAPI CD-ROM connector (optional) PCI Conventional bus add-in card connector 2 PCI Conventional bus add-in card connector 1 Front panel audio connector Secondary PCI Express x16/x4 bus add-in card connector...
  • Page 58: Atapi Cd-Rom Connector (Optional)

    Intel Desktop Board D955XBK Technical Product Specification Table 18. ATAPI CD-ROM Connector (Optional) Signal Name Left audio input from CD-ROM CD audio differential ground CD audio differential ground Right audio input from CD-ROM Table 19. Front Panel Audio Connector Signal Name...
  • Page 59: Chassis Intrusion Connector

    Technical Reference Table 22. Chassis Intrusion Connector Signal Name Intruder Ground Table 23. SCSI Hard Drive Activity LED Connector (Optional) Signal Name ACT# No connect Table 24. Serial ATA Connectors Signal Name Ground Ground Ground Table 25. Auxiliary Power Output Connector (Optional) Signal Name +12 V...
  • Page 60: Power Supply Connectors

    Intel Desktop Board D955XBK Technical Product Specification 2.7.2.1 Power Supply Connectors The board has three power supply connectors: • Main power – a 2 x 12 connector. The board requires a power supply with a 2 x 12 main power cable.
  • Page 61: Main Power Connector

    Technical Reference Table 26. Main Power Connector Signal Name Signal Name +3.3 V +3.3 V +3.3 V -12 V Ground Ground +5 V PS-ON# (power supply remote on/off) Ground Ground +5 V Ground Ground Ground PWRGD (Power Good) No connect +5 V (Standby) +5 V +12 V...
  • Page 62: Auxiliary Front Panel Power/Sleep Led Connector

    Intel Desktop Board D955XBK Technical Product Specification 2.7.2.2 Add-in Card Connectors The board has the following add-in card connectors: • PCI Express x16; one connector supporting simultaneous transfers up to 8 GBytes/sec • Secondary PCI Express x16/x4 bus; one connector supporting simultaneous transfers up to 2 GBytes/sec •...
  • Page 63: Connection Diagram For Front Panel Connector

    Technical Reference 2.7.2.4 Front Panel Connector This section describes the functions of the front panel connector. Table 31 lists the signal names of the front panel connector. Figure 20 is a connection diagram for the front panel connector. Table 31. Front Panel Connector Signal In/Out...
  • Page 64: States For A One-Color Power Led

    Intel Desktop Board D955XBK Technical Product Specification 2.7.2.4.1 Hard Drive Activity LED Connector [Yellow] Pins 1 and 3 [Yellow] can be connected to an LED to provide a visual indicator that data is being read from or written to a hard drive. Proper LED function requires one of the following: •...
  • Page 65: Connection Diagram For Front Panel Usb Connectors

    Technical Reference 2.7.2.5 Front Panel USB Connectors Figure 21 is a connection diagram for the front panel USB connectors. INTEGRATOR’S NOTES • The +5 V DC power on the USB connector is fused. • Pins 1, 3, 5, and 7 comprise one USB port. •...
  • Page 66: Connection Diagram For Front Panel Ieee 1394A/B Connectors

    Intel Desktop Board D955XBK Technical Product Specification 2.7.2.6 Front Panel IEEE 1394a/b Connectors (Optional) Figure 22 is a connection diagram for the IEEE 1394a/b connectors. TPA+ TPA− Ground Ground TPB+ TPB− +12 V DC +12 V DC Key (no pin)
  • Page 67: Jumper Block

    Technical Reference 2.8 Jumper Block CAUTION Do not move the jumper with the power on. Always turn off the power and unplug the power cord from the computer before changing a jumper setting. Otherwise, the board could be damaged. Figure 23 shows the location of the jumper block. The 3-pin jumper block determines the BIOS Setup program’s mode.
  • Page 68: Mechanical Considerations

    Intel Desktop Board D955XBK Technical Product Specification 2.9 Mechanical Considerations 2.9.1 Form Factor The board is designed to fit into an ATX-form-factor chassis. Figure 24 illustrates the mechanical form factor for the board. Dimensions are given in inches [millimeters]. The outer dimensions are 12.00 inches by 9.60 inches [304.80 millimeters by 243.84 millimeters].
  • Page 69: I/O Shield

    I/O shields relative to chassis requirements are described in the ATX specification. NOTE The I/O shield drawings in this document are for reference only. I/O shields compliant with the ATX chassis specification 2.03 are available from Intel. 162.3 REF [6.390] 1.6 ± 0.12 [0.063 ±...
  • Page 70: I/O Shield Dimensions For Boards With The 6-Channel (5.1) Audio Subsystem

    Intel Desktop Board D955XBK Technical Product Specification 162.3 REF [6.390] 1.6 ± 0.12 [0.063 ± 0.005] 20 ± 0.254 TYP [0.787 ± 0.10] 159.2 ± 0.12 1.55 REF [0.061] [6.268 ± 0.005] 22.45 [0.884] 8x R 0.5 MIN 7.012 [0.276] Ø...
  • Page 71: Electrical Considerations

    Technical Reference 2.10 Electrical Considerations 2.10.1 DC Loading Table 35 lists the DC loading characteristics of the board. This data is based on a DC analysis of all active components within the board that impact its power delivery subsystems. The analysis does not include PCI add-in cards.
  • Page 72: Fan Connector Current Capability

    Intel Desktop Board D955XBK Technical Product Specification 2.10.3 Fan Connector Current Capability CAUTION The processor fan must be connected to the processor fan connector, not to a chassis fan connector. Connecting the processor fan to a chassis fan connector may result in onboard component damage that will halt fan operation.
  • Page 73: Thermal Considerations

    All responsibility for determining the adequacy of any thermal or system design remains solely with the reader. Intel makes no warranties or representations that merely following the instructions presented in this document will result in a system with adequate thermal performance.
  • Page 74: Localized High Temperature Zones

    Intel Desktop Board D955XBK Technical Product Specification OM17724 Item Description Processor voltage regulator area Processor Intel 82955X MCH Intel 82801GR ICH7-R Figure 28. Localized High Temperature Zones CAUTION Ensure that the ambient temperature does not exceed the board’s maximum operating temperature.
  • Page 75: Reliability

    C is recommended as a starting point for the processor voltage regulator area. For information about Refer to Intel Pentium 4 processor datasheets and specification updates Section 1.2, page 15 2.12 Reliability The Mean Time Between Failures (MTBF) prediction is calculated using component and subassembly random failure rates.
  • Page 76: Environmental

    Intel Desktop Board D955XBK Technical Product Specification 2.13 Environmental Table 38 lists the environmental specifications for the board. Table 38. Environmental Specifications Parameter Specification Temperature -40 °C to +70 °C Non-Operating 0 °C to +55 °C Operating Shock Unpackaged 50 g trapezoidal waveform...
  • Page 77: Regulatory Compliance

    This section describes the board’s compliance with U.S. and international safety and electromagnetic compatibility (EMC) regulations. 2.14.1 Safety Regulations Table 39 lists the safety regulations the Desktop Board D955XBK complies with when correctly installed in a compatible host system. Table 39.
  • Page 78: European Union Declaration Of Conformity Statement

    Connect the equipment to a different electrical branch circuit from that 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. 2.14.2.2 Canadian Compliance Statement This Class B digital apparatus complies with Canadian ICES-003.
  • Page 79: Recycling Considerations

    Svenska Denna produkt har tillverkats i enlighet med EG-direktiv 89/336/EEC & 73/23/EEC. 2.14.4 Recycling Considerations Intel encourages its customers to recycle its products and their components (e.g., batteries, circuit boards, plastic enclosures, etc.) whenever possible. In the U.S., a list of recyclers in your area can be found at: http://www.eiae.org/...
  • Page 80: Product Certification Markings (Board Level)

    Description Marking UL joint US/Canada Recognized Component mark. Includes adjacent UL file number for Intel Desktop Boards: E210882 (component side). FCC Declaration of Conformity logo mark for Class B equipment; includes Intel name and D955XBK model designation (component side). CE mark. Declares compliance to European Union (EU) EMC directive (89/336/EEC) and Low Voltage directive (73/23/EEC) (component side).
  • Page 81: Overview Of Bios Features

    Legacy USB Support....................83 BIOS Updates ......................84 Boot Options ........................ 85 ® Fast Booting Systems with Intel Rapid BIOS Boot............. 86 BIOS Security Features ....................87 3.1 Introduction The BIOS is stored in either a Firmware Hub (FWH) or a Serial Peripheral Interface (SPI) Flash device and can be updated using a disk-based program.
  • Page 82: Resource Configuration

    Intel Desktop Board D955XBK Technical Product Specification Table 42 lists the BIOS Setup program menu features. Table 42. BIOS Setup Program Menu Bar Maintenance Main Advanced Security Power Boot Exit Clears Displays Configures Sets Configures Selects boot Saves or passwords and...
  • Page 83: System Management Bios (Smbios)

    Overview of BIOS Features To use ATA-66/100 features the following items are required: • An ATA-66/100 peripheral device • An ATA-66/100 compatible cable • ATA-66/100 operating system device drivers NOTE Do not connect an ATA device as a slave on the same IDE cable as an ATAPI master device. For example, do not connect an ATA hard drive as a slave to an ATAPI CD-ROM drive.
  • Page 84: Bios Updates

    To install an operating system that supports USB, follow the operating system’s installation instructions. 3.5 BIOS Updates The BIOS can be updated using either of the following utilities, which are available on the Intel World Wide Web site: • ®...
  • Page 85: Boot Options

    Overview of BIOS Features 3.6 Boot Options In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives, CD-ROM, or the network. The default setting is for the diskette drive to be the first boot device, the hard drive second, and the ATAPI CD-ROM third.
  • Page 86: Fast Booting Systems With Intel ® Rapid Bios Boot

    It is possible to optimize the boot process to the point where the system boots so quickly that the Intel logo screen (or a custom logo splash screen) will not be seen. Monitors and hard disk drives with minimum initialization times can also contribute to a boot time that might be so fast that necessary logo screens and POST messages cannot be seen.
  • Page 87: Bios Security Features

    Overview of BIOS Features 3.8 BIOS Security Features The BIOS includes security features that restrict access to the BIOS Setup program and who can boot the computer. A supervisor password and a user password can be set for the BIOS Setup program and for booting the computer, with the following restrictions: •...
  • Page 88 Intel Desktop Board D955XBK Technical Product Specification...
  • Page 89: Error Messages And Beep Codes

    4 Error Messages and Beep Codes What This Chapter Contains Speaker........................89 BIOS Beep Codes......................89 BIOS Error Messages ....................89 Port 80h POST Codes ....................90 4.1 Speaker The board-mounted speaker provides audible error code (beep code) information during POST. For information about Refer to The location of the onboard speaker...
  • Page 90: Port 80H Post Codes

    Intel Desktop Board D955XBK Technical Product Specification 4.4 Port 80h POST Codes During the POST, the BIOS generates diagnostic progress codes (POST-codes) to I/O port 80h. If the POST fails, execution stops and the last POST code generated is left at port 80h. This code is useful for determining the point where an error occurred.
  • Page 91: Port 80H Post Codes

    Error Messages and Beep Codes Table 49. Port 80h POST Codes POST Code Description of POST Operation Host Processor Power-on initialization of the host processor (Boot Strap Processor) Host processor Cache initialization (including APs) Starting Application processor initialization SMM initialization Chipset Initializing a chipset component Memory...
  • Page 92 Intel Desktop Board D955XBK Technical Product Specification Table 49. Port 80h POST Codes (continued) POST Code Description of POST Operation Keyboard (PS2 or USB) Resetting keyboard Disabling the keyboard Detecting the presence of the keyboard Enabling the keyboard Clearing keyboard input buffer...
  • Page 93 Error Messages and Beep Codes Table 49. Port 80h POST Codes (continued) POST Code Description of POST Operation DXE Drivers Waiting for user input Checking password Entering BIOS setup TBD – Flash Update Calling Legacy Option ROMs TBD – Calling INT 19. One beep unless silent boot is enabled. TBD –...
  • Page 94: Typical Port 80H Post Sequence

    Intel Desktop Board D955XBK Technical Product Specification Table 50. Typical Port 80h POST Sequence POST Code Description Initializing a chipset component Reading SPD from memory DIMMs Detecting presence of memory DIMMs Configuring memory Testing memory Loading recovery capsule Entered DXE phase...

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