Intel Desktop Board D915PCM User manual

Intel®Desktop Board
D915PCM
Specification Update
Release Date: July 2006
Order Number: C80888-004US
The Intel®Desktop Board D915PCM 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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The Intel®desktop board D915PCM 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
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CONTENTS
REVISION HISTORY..................................................................................................................................... v
PREFACE.........................................................................................................................................................vi
Specification Update for the Intel®Desktop Board D915PCM
GENERAL INFORMATION ............................................................................................................................3
SPECIFICATION CHANGES.........................................................................................................................5
ERRATA ..........................................................................................................................................................6
DOCUMENTATION CHANGES.....................................................................................................................7

Intel®Desktop Board D915PCM Specification Update
v
REVISION HISTORY
Date of Revision Version Description
June 21, 2004 -001 This document is the first Specification Update for the
Intel®Desktop Board D915PCM.
September 2004 -002 Added Documentation Changes 1, 2.
March 2005 -003 Added Erratum 1.
July 2006 -004 Added Specification Changes 1, Erratum 2 and updated
the General Information table.

Intel®Desktop Board D915PCM Specification Update
v
i
PREFACE
This document is an update to the specifications contained in the Intel®Desktop Board D915PCM
Technical Product Specification (Order number C74531). 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 D915PCM. 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®915G and 915P Chipset: Specification Update (Order Number 301468) for
specification updates concerning the 82915P MCH Controller and that may apply to the desktop
board D915PCM. 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®IO Controller Hub 6 (ICH6) Family Specification Update (Order Number
301474) for specification updates concerning the 82801ER I/O Controller Hub and that may
apply to the desktop board D915PCM. Unless otherwise noted in this document, it should be
assumed that any ICH 6 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
D915PCM’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 D915PCM

Intel®Desktop Board D915PCM Specification Update
3
GENERAL INFORMATION
Basic Desktop Board D915PCM Identification Information
AA Revision BIOS Revision Notes
C64000-203 CY91510A.86A.0012 1-2
C64000-204 CY91510A.86A.0012 1-2
C64000-205 CY91510A.86A.0026 1-2
C64000-206 CY91510A.86A.0026 1-2
C64000-207 CY91510A.86A.0035 1-2
NOTES:
1. The AA number is found on a small label on the component side of the board.
2. The 82915P Chipset kit used on this AA revision consists of two components as follows:
Device Stepping S-Spec Numbers
82915P MCH B1 SL7LY
82801FB ICH6 B1 SL7AG

Intel®Desktop Board D915PCM Specification Update
4
Summary Table of Changes
The following table indicates the Specification Changes, Errata, Specification Clarifications, or
Documentation Changes that apply to the Intel®Desktop Board D915PCM. 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 Changes to Section 2.8.2.3, Add-in Card Connectors
NO. PLANS ERRATA
1 Plan Fix Wake On LAN may not function after loss and restore of AC power
2 Plan Fix The placement of capacitors behind the PCI Express* x1 connector slot may
prohibit some PCI Express x1 Add-in cards from properly connecting to the
motherboard
NO. PLANS DOCUMENTATION CHANGES
1 Doc BIOS ID String is Incorrect
2 Doc BIOS ID string is incorrect within Section 3.1, Introduction

Intel®Desktop Board D915PCM Specification Update
5
SPECIFICATION CHANGES
The Specification Changes listed in this section apply to the Desktop Board D915PCM Technical
Product Specification (Order Number C74531). All Specification Changes will be incorporated
into a future version of that specification.
1. The following note will be added to the TPS in
Section 2.8.2.3 Add-in Card Connectors:
 NOTE
Capacitors required for the audio circuitry are located within the ATX keep-out area near the PCI
Express* x1 slot, and may limit the use of some PCI Express x1 cards.

Intel®Desktop Board D915PCM Specification Update
6
ERRATA
1. Wake On LAN May Not Function After Loss and Restore
of AC Power
PROBLEM:If AC power is removed, Wake On LAN may not function until the LAN circuit is re-
initialized. The sequence of events is as follows:
•AC power removed (AC power cord disconnected, for example)
•AC power restored. +5V Standby voltage is re-applied to the board
•Wake On LAN may not be functional
•Switch power on
•Switch power off to put system back into Standby mode (S5 state)
•Wake On LAN functionality restored
IMPLICATION:Wake on LAN will not function if AC power is interrupted.
WORKAROUND:In the BIOS Setup program, set After Power Failure to “Power On” in the
Power Menu.
STATUS:This erratum may be fixed in a future BIOS revision.
2. The placement of capacitors behind the PCI Express* x1
connector slot may prohibit some PCI Express x1 add-in
cards from properly connecting to the motherboard.
PROBLEM:Due to the design and placement of the audio circuitry on this motherboard, it was necessary to
position capacitors in the keep-out zone behind the PCI Express* x1 connector slot.
IMPLICATION:Some PCI Express x1 add-in cards may not fully connect to the PCI Express x1 connector slot,
due to interference between capacitors in the keep-out zone and I/O connectors on the add-in card that are
located on the I/O bracket, in line with the edge fingers on the card.
WORKAROUND:None
STATUS:MAY BE FIXED IN A LATER HARDWARE REVISION.

Intel®Desktop Board D915PCM Specification Update
7
DOCUMENTATION CHANGES
The Documentation Changes listed in this section apply to the the Intel®Desktop Board
D915PCM Technical Product Specification (Order number C74531). All Documentation Changes
will be incorporated into a future version of that specification.
1. BIOS ID String is Incorrect
On page ii, the first paragraph below the Revision History table will be replaced in its entirety as
follows:
This product specification applies to only the standard Intel®Desktop Boards D915PCY and
D915PCM with BIOS identifier CY91510A.86A.
2. BIOS ID String is Incorrect Within Section 3.1,
Introduction
Section 3.1, page 89, the second paragraph will be replaced in its entirety as follows:
The BIOS displays a message during POST identifying the type of BIOS and a revision code.
The initial production BIOSs are identified as CY91510A.86A.