Intel D875PBZ - Desktop Board Motherboard Technical manual

Intel®Desktop Board
D875PBZ
Specification Update
Release Date: August 2004
Order Number: C40099-010
The Intel®Desktop Board D875PBZ may contain design defects or errors known as errata, which
may cause the product to deviate from published specifications. Current characterized errata are
documented in this Specification Update.

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Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from
future changes to them.
The Intel®desktop board D875PBZ 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 before placing your product order.
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Copyright ©2003, 2004 Intel Corporation.

CONTENTS
REVISION HISTORY ................................................................................................................................... v
PREFACE................................................................................................................................................... vi
Specification Update for the Intel®Desktop Board D875PBZ
GENERAL INFORMATION ..........................................................................................................................3
SPECIFICATION CHANGES .......................................................................................................................6
ERRATA .................................................................................................................................................... 11
SPECIFICATION CLARIFICATIONS ......................................................................................................... 13
DOCUMENTATION CHANGES ................................................................................................................. 18

Intel®Desktop Board D875PBZ Specification Update
v
REVISION HISTORY
Date of Revision Version Description
May 2003 -001 This document is the first Specification Update for the
Intel®Desktop Board D875PBZ.Added Specification
Clarification 1.
July 2003 -002 Added Errata 1, 2. Added Specification Clarification 2. Added
Documentation Change 1.
August 2003 -003 Added Documentation Change 2.
November 2003 -004 Added Specification Change 1, Specification Clarification 3 and
Document Change 3.
January 2004 -005 Added Specification Changes 2, 3. Added Erratum 3. Added
Specification Clarifications 4, 5.
March 2004 -006 Added Specification Change 4.
April 2004 -007 Added Erratum 4.
May 2004 -008 Added Specification Change 5. Updated Erratum 4. Added
Specification Clarification 6, 7.
July 2004 -009 Updated Specification Clarifications 2 and 7.
August 2004 -010 Added Erratum 5.

Intel®Desktop Board D875PBZ Specification Update
v
i
PREFACE
This document is an update to the specifications contained in the Intel
®
Desktop Board D875PBZ Technical
Product Specification
(Order number C31765). It is intended for hardware system manufacturers and
software developers of applications, operating systems, or tools. It will contain Specification Changes,
Errata, Specification Clarifications, and Documentation Changes.
Refer to the
Intel
®
Pentium
®
4 Processor Specification Update (Order number 249199) for specification
updates concerning the Intel Pentium 4 processor and that may apply to the desktop board D875PBZ.
Unless otherwise noted in this document, it should be assumed that any processor errata for a given stepping
are applicable to the Altered Assembly (AA) revision(s) associated with that stepping.
Refer to the
Intel
®
875P Chipset: 82875P Memory Controller Hub (MCH) Specification Update (Order
Number 252526) for specification updates concerning the 82875P MCH Controller and that may apply to the
desktop board D875PBZ. Unless otherwise noted in this document, it should be assumed that any MCH
errata for a given stepping are applicable to the Altered Assembly (AA) revision(s) associated with that
stepping.
Refer to the
Intel
®
82801ER I/O Controller Hub 5 (ICH5) Specification Update (Order Number 252517) for
specification updates concerning the 82801ER I/O Controller Hub and that may apply to the desktop board
D875PBZ. Unless otherwise noted in this document, it should be assumed that any ICH 5 errata for a given
stepping are applicable to the Altered Assembly (AA) revision(s) associated with that stepping.
Nomenclature
Specification Changes are modifications to the current published specifications. These changes will be
incorporated in the next release of the specifications.
Errata are design defects or errors. Characterized errata may cause the desktop board D875PBZ’s behavior
to deviate from published specifications. Hardware and software designed to be used with any given Altered
Assembly (AA) and BIOS revision level must assume that all errata documented for that AA and BIOS
revision level are present on all desktop boards.
Specification Clarifications describe a specification in greater detail or further highlight a specification’s
impact to a complex design situation. These clarifications will be incorporated in the next release of the
specifications.
Documentation Changes include typos, errors, or omissions from the current published specifications.
These changes will be incorporated in the next release of the specifications.

Specification Update for the
Intel®Desktop Board D875PBZ

Intel®Desktop Board D875PBZ Specification Update
3
GENERAL INFORMATION
Basic Desktop Board D875PBZ Identification Information
AA Revision BIOS Revision Notes
C27085-204 BZ87510A.86A.0019.P02 1-5
C27085-205 BZ87510A.86A.0023.P04 1-5
C27085-206 BZ87510A.86A.0026.P05 1-5
C27085-207 BZ87510A.86A.0047.P12 1-5
C27085-208 BZ87510A.86A.0089.P20 1-5
C26680-204 BZ87510A.86A.0019.P02 1-5
C26680-205 BZ87510A.86A.0026.P05 1-5
C26680-206 BZ87510A.86A. 0047.P12 1-5
C26680-301 BZ87510A.86A. 0076.P16 1-5
C26680-302 BZ87510A.86A. 0083.P18 1-5
C26680-303 BZ87510A.86A.0089.P20 1-5
NOTES:
1. The AA number is found on a small label on the component side of the board.
2. The 82875P Chipset kit used on this AA revision consists of two components as follows:
Device Stepping S-Spec Numbers
82875P MCH A2 SL744
82801ER ICH A3 SL742
3. Refer to the Intel
®
Pentium
®
4 Processor Specification Update (Order Number 249199) for errata related to the Pentium 4
processor and that may apply to the desktop board D875PBZ.
4. Refer to the
Intel
®
875P Chipset: 82875P Memory Controller Hub (MCH) Specification Update (Order Number 252526) for
errata related to the 82875P MCH
that may apply to the desktop board D875PBZ.
5. Refer to the
Intel
®
82801ER I/O Controller Hub 5 (ICH5) Specification Update (Order Number 252517) for errata related to
the 82801ER I/O Controller Hub that may apply to the desktop board D875PBZ.

Intel®Desktop Board D875PBZ Specification Update
4
Summary Table of Changes
The following table indicates the Specification Changes, Errata, Specification Clarifications, or Documentation
Changes that apply to the desktop board D875PBZ. Intel intends to fix some of the errata in a future revision
of the desktop board, and to account for the other outstanding issues through documentation or specification
changes as noted. This table uses the following notations:
CODES USED IN SUMMARY TABLE
Doc: Document change or update that will be implemented.
PlanFix: This erratum may be fixed in a future revision of the desktop board, driver, or
BIOS.
Fixed: This erratum has been previously fixed.
NoFix: There are no plans to fix this erratum.
Shaded: This erratum is either new or modified from the previous version of the document.
NO. PLANS SPECIFICATION CHANGES
1 Doc Change to description of the SMBIOS specification listed in Table 3, Section 1.4
2 Doc Change to description of the SMBIOS specification listed in Table 3, Section 1.4
3 Doc Change to description of Section 2.11.1, DC Loading
4 Doc Change to Thermal Considerations, Section 2.12
5 Doc Change to description of Section 1.7.3.3, serial ATA RAID. Addition of RAID 1 support
NO. PLANS ERRATA
1 No Fix Audio driver creates a popping noise during operating system startup
2 Plan Fix Front panel audio connector signals routed incorrectly
3 Plan Fix PCI slot 1 cannot be used with long PCI add-in cards
4 Plan Fix System memory may be reduced in excess of the amount of AGP aperture size when
4GB of system memory are used
5 Plan Fix Some systems may hang if the mouse is moved when entering standby mode
NO. PLANS SPECIFICATION CLARIFICATIONS
1 Doc Add note that specifies Enhanced Mode IDE/Serial ATA requirements to Section 3.3.2,
PCI IDE Support
2 Doc Change to description of Table 22, Front Panel Audio Connector
3 Doc Clarification of SMBus routing
4 Doc Clarification of DDR voltage
5 Doc Clarification of Section 2.11.1, DC Loading
6 Doc Change to description of Section 2.11.3, Fan Connector Current Supply, Correction of
processor and voltage regulator fan current
7 Doc Change to description of Section 2.9.1, Front Panel Audio Connector/Jumper Block

Intel®Desktop Board D875PBZ Specification Update
5
NO. PLANS DOCUMENTATION CHANGES
1 Doc Change to description of Section 1.4, Design Specifications
2 Doc Addition of Memory Configuration Setting to Section 4.3, BIOS Setup, Main Menu
3 Doc Removal of Intel®branding from subtitle of Section 1.9.2

Intel®Desktop Board D875PBZ Specification Update
6
SPECIFICATION CHANGES
The Specification Changes listed in this section apply to the Desktop Board D875PBZ Technical Product
Specification
(Order Number C31765). All Specification Changes will be incorporated into a future version of
that specification.
1. Change to Description of the SMBIOS Specification Listed in
Table 3, Section 1.4
Table 3, Section 1.4, SMBIOS specification will change as follows:
Table 3. Specifications
Reference
Name
Specification
Title
Version, Revision Date,
and Ownership
The information is
available from…
SMBIOS
System
Management
BIOS
Version 2.3.2,
October 12, 2001,
Distributed Management
Taskforce, Inc (DMTF)
http://www.dmtf.org/stand
ards/documents/SMBIOS
/DSP0130.pdf
2. Change to Description of the SMBIOS Specification Listed in
Table 3, Section 1.4
Table 3, Section 1.4, SMBIOS specification will change as follows:
Table 3. Specifications
Reference
Name
Specification
Title
Version, Revision Date,
and Ownership
The information is
available from…
SMBIOS
System
Management
BIOS
Version 2.3.4,
December 6, 2002,
Distributed Management
Taskforce, Inc (DMTF)
http://www.dmtf.org/stand
ards/documents/SMBIOS/
DSP0134.pdf
3. Change to Description of Section 2.11.1, DC Loading
Table 39, Section 2.11.1, DC Loading, will change in its entirety as follows:
2.11.1 DC LOADING
Table 39 lists the DC loading characteristics of the board.

Intel®Desktop Board D875PBZ Specification Update
7
Table 39. DC Loading Characteristics
DC Current at:
Mode DC Power +3.3 V +5 V +12 V -12 V +5 VSB
Minimum loading 190.00 W 5.00 A 11.00 A 9.00 A 0.03 A 0.60 A
Maximum loading 310.00 W 11.00 A 15.00 A 15.00 A 0.10 A 1.38 A
4. Change to Thermal Considerations, Section 2.12
Section 2.12, Thermal Considerations will change in its entirety as follows:
2.12 Thermal Considerations
CAUTION
The use of an Intel
®Pentium ®4 processor operating above 2.80 GHz with this
Intel
®desktop board requires the following:
• A chassis with appropriate airflow to ensure proper cooling of the
components on the board
• A processor fan heatsink that meets the thermal performance targets for
Pentium 4 processors operating above 2.80 GHz
The use of an Intel Pentium 4 processor with 1 MB of L2 cache on this Intel
desktop board requires the following:
• A chassis with a maximum internal ambient temperature of 38 Degrees
Celsius
• A processor heatsink that provides omnidirectional airflow so that air is
drawn across the processor voltage regulator area (item A in Figure 27).
Figure 26a illustrates an omnidirectional airflow heatsink.

Intel®Desktop Board D875PBZ Specification Update
8
Figure 26a. Omnidirectional Airflow Heatsink
Failure to ensure appropriate airflow may result in reduced performance of both
the processor and/or voltage regulator or, in some instances, damage to the
desktop board. For a list of chassis that have been tested with Intel
®desktop
boards please refer to the following website:
http://developer.intel.com/design/motherbd/cooling.htm
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.
CAUTION
Ensure that the ambient temperature does not exceed the Desktop Board
D875PBZ’s maximum operating temperature. Failure to do so could cause
components to exceed their maximum case temperature and malfunction. For
information about the maximum operating temperature, see the environmental
specifications in Section 2.14.

Intel®Desktop Board D875PBZ Specification Update
9
CAUTION
Ensure that proper airflow is maintained in the processor voltage regulator
circuit. Failure to do so may result in damage to the voltage regulator circuit.
The processor voltage regulator area (item A in Figure 27) can reach a
temperature of up to 85 °C in an open chassis.
Figure 27 shows the locations of the localized high temperature zones.
Item Description
A Processor voltage regulator area
B Processor
C Intel®82875P MCH
D Intel®82801ER ICH5-R
Figure 27. Localized High Temperature Zones

Intel®Desktop Board D875PBZ Specification Update
10
Table 41 provides maximum case temperatures for components on the Desktop Board
D875PBZ that are sensitive to thermal changes. The operating temperature, current
load, or operating frequency could affect case temperatures. Maximum case
temperatures are important when considering proper airflow to cool the Desktop Board
D875PBZ.
Table 41. Thermal Considerations for Components
Component Maximum Case Temperature
Intel®Pentium®4 processor For processor case temperature, see processor
datasheets and processor specification updates
Intel®82875P MCH 99 oC (under bias)
Intel®82801ER ICH5-R 115 oC (under bias)
For information about Refer to
Intel Pentium 4 processor datasheets and specification
updates
Section 1.2, page 16
5. Change to Description of Section 1.7.3.3, Serial ATA RAID.
Addition of RAID 1 Support
Section 1.7.3.3 will change in its entirety as follows:
1.7.3.3 Serial ATA RAID
The ICH5-R supports RAID (Redundant Array of Independent Drives) level 0
and level 1 on the Serial ATA ports. RAID 0 provides the ability to support
striping. Two physical drives, of identical size, 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. RAID 1 provides the
support of disk mirroring. Data is written simultaneously to two physical drives,
of identical size, providing fault tolerance if one of the two drives fails.
✏NOTE
The ICH5-R provides support for RAID O, RAID 1 and RAID boot in
Windows* XP and Windows 2000 only.

Intel®Desktop Board D875PBZ Specification Update
11
ERRATA
1. Audio Driver Creates a Popping Noise During Operating System
Startup
PROBLEM:The audio jack-sensing feature requires reading the impedance of the device connected to the
audio jack. A voltage is needed so a current can be measured, and the impedance is derived from the
voltage and current. The application of the voltage results in a popping noise that is emitted from the
speakers.
IMPLICATION:A popping noise from the speakers may be heard at the end of the operating system startup
tune, while loading Microsoft Windows operating systems.
WORKAROUND:None.
STATUS:This erratum will not be fixed.
2. Front Panel Audio Connector Signals Routed Incorrectly
PROBLEM:The front panel audio connector pin definition is not correct. Pin 4 is defined as +5 V and should
be ground. Pin 7 is defined as ground and should be +5V.
IMPLICATION:Front panel audio cards that route their +5 V rail to Pin 4 will not function correctly.
WORKAROUND:Front panel audio cards that require +5 V should route the +5 V rail to Pin 7.
STATUS:This erratum may be fixed in a future hardware revision.
3. PCI Slot 1 Cannot be Used With Long PCI Add-in Cards
PROBLEM:A tall capacitor is located 3 ¼ inches behind PCI slot 1.
IMPLICATION:PCI cards conforming to the PCI specification may not be useable in PCI slot 1.
WORKAROUND:None.
STATUS:This erratum may be fixed in a future hardware revision.
4. System Memory May Be Reduced in Excess of the Amount of AGP
Aperture Size When 4GB of System Memory are Used
PROBLEM:The AGP aperture size setting in the system BIOS will consume, from available system memory,
2 times the amount applied in the AGP aperture setting when the maximum of 4 GB of system memory is
installed.
IMPLICATION:When 4GB of system memory are used, and system memory is allocated to AGP aperture
size in BIOS Setup, available system memory may be reduced by twice the amount allocated. A similar
impact to available system memory may occur from any allocation of system memory when 4 GB of system
memory is used. For example, increasing the video frame buffer in BIOS may also reduce available memory
in excess of the amount requested.
WORKAROUND:None.
STATUS:This erratum may be fixed in a future BIOS revision.

Intel®Desktop Board D875PBZ Specification Update
12
5. Some Systems May Hang if the Mouse is Moved When Entering
Standby Mode
PROBLEM:Moving the mouse after placing the system into standby with the mouse may cause the system
to immediately awaken and hang.
IMPLICATION:The system may hang if the user is moving the mouse directly after using the mouse to place
the system into standby mode.
WORKAROUND:None.
STATUS:This erratum may be fixed in a future board revision.

Intel®Desktop Board D875PBZ Specification Update
13
SPECIFICATION CLARIFICATIONS
The Specification Clarifications listed in this section apply to the Desktop Board D875PBZ Technical Product
Specification
(Order Number C31765). All Specification Clarifications will be incorporated into a future
version of that specification.
1. Add Note That Specifies Enhanced Mode IDE/Serial ATA
Requirements to Section 3.3.2, PCI IDE Support
✏ NOTE
The Enhanced mode IDE/Serial ATA BIOS option requires support for resources
up to a maximum six devices, and has been tested with Windows 2000 and
Windows XP. This BIOS option should be set to Legacy mode when used with
operating systems that support a maximum of two IDE channels (four devices).
2. Change to Description of Table 22, Front Panel Audio Connector
Table 22, Front Panel Audio Connector will change in its entirety as follows:
Table 22. Front Panel Audio Connector
Pin Signal Name Pin Signal Name
1 Mono Mic in (Stereo Mic 1) 2 Ground
3 Mono Mic Bias (Stereo Mic 2) 4 +5 V
5 RIGHT_OUT 6 Right channel return
7 No connect 8 Key
9 LEFT_OUT 10 Left channel return
#INTEGRATOR’S NOTE
The front panel audio connector is alternately used as a jumper block for routing
audio signals. Refer to Section 2.9.1 on page 72 for more information.
3. Clarification of SMBus Routing
Section 2.8.2.1 will change in its entirety as follows:

Intel®Desktop Board D875PBZ Specification Update
14
2.8.2.1 Expansion Slots
The Desktop Board D875PBZ has the following expansion slots:
• AGP connector: The AGP connector is keyed for Universal 0.8 V AGP 3.0
cards or 1.5 V AGP 2.0 cards only. Do not install a legacy 3.3 V AGP card.
The AGP connector is not mechanically compatible with legacy 3.3 V AGP
cards.
• Five PCI rev 2.2 compliant local bus slots: The SMBus is routed to PCI bus
connector 2 only (ATX expansion slot 6). PCI add-in cards with SMBus
support can access sensor data and other information residing on the Desktop
Board D875PBZ.
✏NOTE
The SMBus routing to the PCI bus connectors does not conform to the PCI
Engineering Change Notice (ECN) “Addition of the SMBus to the PCI Connector
ECN”, dated October 5th, 2000. The ECN specifies that SMBus signals must be
routed to all PCI bus connectors. On this board, SMBus signals are routed to
PCI bus connector 2 only.
Add-in cards that implement PCI bus connector pins A40 and A41 for any
purpose other than SMBCLK (SMBus clock) and SMBDAT (SMBus data) should
not be installed in PCI bus connector 2.
For information about Refer to
Addition of the SMBus to the PCI Connector ECN http://www.pcisig.com/data/specificati
ons/smb_ecn_040501.pdf
✏NOTE
This document references back-panel slot numbering with respect to processor
location on the Desktop Board D875PBZ. The AGP slot is not numbered. PCI
slots are identified as PCI slot #x, starting with the slot closest to the processor.
Figure 19 on page 66 illustrates the Desktop Board D875PBZ’s PCI slot
numbering.
4. Clarification of DDR Voltage
Section 1.6.1 will change as follows: