Intel D815EGEWLU - P3 Socket 370 MicroATX... User manual

Intel®Desktop Board
D815EGEW
Technical Product Specification
October 2001
Order Number A73971-001
The Intel®Desktop Board D815EGEW 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 D815EGEW Specification Update.

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board D815EGEW Technical Product
Specification
October 2001
This product specification applies to only standard D815EGEW boards with BIOS identifier
EW81520A.86A.
Changes to this specification will be published in the Intel Desktop Board D815EGEW
Specification Update before being incorporated into a revision of this document.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL®PRODUCTS. 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 Corporation may have patents or pending patent applications, trademarks, copyrights, or other intellectual property
rights that relate to the presented subject matter. The furnishing of documents and other materials and information does
not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other
intellectual property rights.
Intel products are not intended for use in medical, life saving, or life sustaining applications or for any other application in
which the failure of the Intel product could create a situation where personal injury or death may occur.
Intel may make changes to specifications and product descriptions at any time, without notice.
The Intel®Desktop Board D815EGEW may contain design defects or errors known as errata that 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.
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. Box 5937
Denver, CO 80217-9808
or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777,
Germany 44-0-1793-421-333, other Countries 708-296-9333.
Intel, Celeron and LANDesk are registered trademarks of Intel Corporation or its subsidiaries in the United States and other
countries.
†Other names and brands may be claimed as the property of others.
Copyright 2001, Intel Corporation. All rights reserved.

iii
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for the Intel Desktop Boards D815EGEW.
It describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the D815EGEW board 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.
What This Document Contains
Chapter Description
1 A description of the hardware used on the D815EGEW board
2 A map of the resources of the board
3 The features supported by the BIOS Setup program
4 The contents of the BIOS Setup program’s menus and submenus
5 A description of the BIOS error messages, beep codes, and POST codes
Typographical Conventions
This section contains information about the conventions used in this specification. Not all of these
symbols and abbreviations appear in all specifications of this type.
Notes, Cautions, and Warnings
✏ NOTE
Notes call attention to important information.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
WARNING
Warnings indicate conditions, which if not observed, can cause personal injury.

Intel Desktop Board D815EGEW Technical Product Specification
iv
Other Common Notation
# Used after a signal name to identify an active-low signal (such as USBP0#)
(NxnX) When used in the description of a component, N indicates component type, xn are the relative
coordinates of its location on the D815EGEW board, 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.
GB Gigabyte (1,073,741,824 bytes)
KB Kilobyte (1024 bytes)
Kbit Kilobit (1024 bits)
kbits/sec 1000 bits per second
MB Megabyte (1,048,576 bytes)
MB/sec Megabytes per second
Mbit Megabit (1,048,576 bits)
Mbit/sec Megabits per second
xxh An address or data value ending with a lowercase h indicates a hexadecimal value.
x.x V Volts. Voltages are DC unless otherwise specified.
†This symbol is used to indicate third-party brands and names that are the property of their
respective owners.

v
Contents
1Product Description
1.1 Overview ....................................................................................................................12
1.1.1 Feature Summary ........................................................................................12
1.1.2 Manufacturing Options .................................................................................13
1.1.3 Board Layout................................................................................................14
1.1.4 Block Diagram..............................................................................................15
1.2 Online Support ...........................................................................................................16
1.3 Operating System Support .........................................................................................16
1.4 Design Specifications .................................................................................................17
1.5 Processor ...................................................................................................................19
1.6 System Memory .........................................................................................................20
1.7 Intel®815EG Chipset..................................................................................................22
1.7.1 IDE Interfaces ..............................................................................................23
1.7.2 USB..............................................................................................................23
1.7.3 Real-Time Clock, CMOS SRAM, and Battery...............................................24
1.8 I/O Controller ..............................................................................................................24
1.8.1 Serial Port ....................................................................................................25
1.8.2 Parallel Port..................................................................................................25
1.8.3 Diskette Drive Controller ..............................................................................25
1.8.4 Keyboard and Mouse Interface ....................................................................25
1.9 Graphics Subsystem ..................................................................................................26
1.10 Audio Subsystem........................................................................................................29
1.10.1 AD1885 Audio Codec...................................................................................29
1.10.2 Audio Connectors.........................................................................................30
1.11 LAN Subsystem (Optional) .........................................................................................31
1.11.1 Intel®82562ET Platform LAN Connect Device.............................................31
1.11.2 RJ-45 LAN Connector LEDs.........................................................................31
1.12 Fan Control and Monitoring ........................................................................................32
1.13 Power Management ...................................................................................................32
1.13.1 ACPI.............................................................................................................32
1.13.2 Hardware Support ........................................................................................35
2Technical Reference
2.1 Introduction.................................................................................................................39
2.2 Memory Map ..............................................................................................................39
2.3 I/O Map .....................................................................................................................40
2.4 DMA Channels ...........................................................................................................42
2.5 PCI Configuration Space Map ....................................................................................42
2.6 Interrupts ....................................................................................................................43
2.7 PCI Interrupt Routing Map..........................................................................................43

Intel Desktop Board D815EGEW Technical Product Specification
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2.8 Connectors .................................................................................................................45
2.8.1 Back Panel Connectors................................................................................46
2.8.2 Internal I/O Connectors ................................................................................50
2.8.3 External I/O Connectors ...............................................................................58
2.9 Jumper Blocks............................................................................................................61
2.9.1 Wake from PS/2 Jumper Block.....................................................................62
2.9.2 Wake from USB Jumper Block.....................................................................62
2.9.3 BIOS Setup Configuration Jumper Block......................................................63
2.10 Mechanical Considerations.........................................................................................64
2.10.1 Form Factor .................................................................................................64
2.10.2 I/O Shields ...................................................................................................65
2.11 Electrical Considerations ............................................................................................67
2.11.1 Power Consumption.....................................................................................67
2.11.2 Add-in Board Considerations........................................................................68
2.11.3 Standby Current Requirements ....................................................................68
2.11.4 Fan Connector Current Capability ................................................................69
2.11.5 Power Supply Considerations ......................................................................69
2.12 Thermal Considerations..............................................................................................70
2.13 Reliability ....................................................................................................................71
2.14 Environmental ............................................................................................................72
2.15 Regulatory Compliance ..............................................................................................73
2.15.1 Safety Regulations .......................................................................................73
2.15.2 EMC Regulations .........................................................................................73
2.15.3 Product Certification Markings (Board Level) ...............................................74
3Overview of BIOS Features
3.1 Introduction.................................................................................................................75
3.2 BIOS Flash Memory Organization ..............................................................................76
3.3 Resource Configuration..............................................................................................76
3.3.1 PCI Autoconfiguration ..................................................................................76
3.3.2 IDE Support .................................................................................................76
3.4 System Management BIOS (SMBIOS).......................................................................77
3.5 Legacy USB Support ..................................................................................................78
3.6 BIOS Updates ............................................................................................................79
3.6.1 Language Support........................................................................................79
3.6.2 Custom Splash Screen.................................................................................79
3.7 Recovering BIOS Data ...............................................................................................80
3.8 Boot Options...............................................................................................................81
3.8.1 CD-ROM and Network Boot .........................................................................81
3.8.2 Booting without Attached Devices ................................................................81
3.9 Fast Booting Systems with Intel®Rapid BIOS Boot....................................................81
3.9.1 Peripheral Selection and Configuration ........................................................82
3.9.2 Intel Rapid BIOS Boot ..................................................................................82
3.10 BIOS Security Features..............................................................................................83

Contents
vii
4BIOS Setup Program
4.1 Introduction.................................................................................................................85
4.2 Maintenance Menu .....................................................................................................86
4.2.1 Extended Configuration Submenu................................................................87
4.3 Main Menu..................................................................................................................88
4.4 Advanced Menu..........................................................................................................89
4.4.1 PCI Configuration Submenu.........................................................................90
4.4.2 Boot Configuration Submenu .......................................................................91
4.4.3 Peripheral Configuration Submenu...............................................................92
4.4.4 IDE Configuration Submenu.........................................................................94
4.4.5 Diskette Configuration Submenu..................................................................97
4.4.6 Event Log Configuration Submenu...............................................................98
4.4.7 Video Configuration Submenu......................................................................99
4.5 Security Menu ..........................................................................................................100
4.6 Power Menu .............................................................................................................101
4.6.1 ACPI Submenu ..........................................................................................102
4.7 Boot Menu................................................................................................................103
4.7.1 Boot Device Priority Submenu....................................................................104
4.7.2 Hard Disk Drives Submenu ........................................................................105
4.7.3 Removable Devices Submenu ...................................................................105
4.7.4 ATAPI CDROM Drives Submenu ...............................................................106
4.8 Exit Menu .................................................................................................................106
5Error Messages and Beep Codes
5.1 BIOS Error Messages...............................................................................................107
5.2 Port 80h POST Codes..............................................................................................109
5.3 Bus Initialization Checkpoints ...................................................................................113
5.4 Speaker ...................................................................................................................114
5.5 BIOS Beep Codes ....................................................................................................115
Figures
1. Board Components.....................................................................................................14
2. Block Diagram for the D815EGEW Board ..................................................................15
3. Intel 815EG Chipset Block Diagram ...........................................................................22
4. Block Diagram of Audio Subsystem............................................................................29
5. Using the Wake on LAN Technology Connector.........................................................37
6. Location of the Optional Standby Power Indicator LED ..............................................38
7. Back Panel Connectors ..............................................................................................46
8. Audio, Hardware Control, and Fan Connectors ..........................................................51
9. Add-in Board and Peripheral Interface Connectors.....................................................54
10. External I/O Connectors .............................................................................................58
11. Location of the Jumper Blocks....................................................................................61
12. Board Dimensions ......................................................................................................64
13. I/O Shield Dimensions (for D815EGEW Boards without Onboard LAN Subsystem)...65
14. I/O Shield Dimensions (for D815EGEW Boards with Onboard LAN Subsystem)........66
15. Localized High Temperature Zones............................................................................70

Intel Desktop Board D815EGEW Technical Product Specification
viii
Tables
1. Feature Summary.......................................................................................................12
2. Manufacturing Options ...............................................................................................13
3. Specifications .............................................................................................................17
4. Supported Processors ................................................................................................19
5. Supported Memory Configurations .............................................................................21
6. Supported Graphics Refresh Frequencies..................................................................27
7. LAN Connector LED States ........................................................................................31
8. Effects of Pressing the Power Switch .........................................................................33
9. Power States and Targeted System Power ................................................................34
10. Wake Up Devices and Events ....................................................................................34
11. Fan Connector Descriptions .......................................................................................36
12. System Memory Map..................................................................................................39
13. I/O Map ......................................................................................................................40
14. DMA Channels ...........................................................................................................42
15. PCI Configuration Space Map ....................................................................................42
16. Interrupts ....................................................................................................................43
17. PCI Interrupt Routing Map..........................................................................................44
18. Overcurrent Protection for Back Panel Connectors ....................................................47
19. PS/2 Mouse/Keyboard Connectors.............................................................................47
20. USB Connectors.........................................................................................................47
21. VGA Port Connector...................................................................................................47
22. Parallel Port Connector...............................................................................................48
23. Serial Port A Connector..............................................................................................48
24. LAN Connector (Optional) ..........................................................................................49
25. Mic In Connector ........................................................................................................49
26. Audio Line Out Connector ..........................................................................................49
27. Audio Line In Connector .............................................................................................49
28. Auxiliary Line In Connector.........................................................................................52
29. ATAPI CD-ROM Connector ........................................................................................52
30. Processor Fan Connector...........................................................................................52
31. Power Connector........................................................................................................52
32. Wake on LAN Technology Connector (Optional) ........................................................53
33. System Fan Connector (Optional) ..............................................................................53
34. Chassis Intrusion Connector (Optional) ......................................................................53
35. PCI Bus Connectors ...................................................................................................55
36. Diskette Drive Connector............................................................................................56
37. IDE Connectors ..........................................................................................................56
38. SCSI LED Connector (Optional) .................................................................................57
39. Auxiliary Front Panel Power LED Connector ..............................................................58
40. Front Panel Connector ...............................................................................................59
41. States for a Single-Colored Power LED......................................................................59
42. States for a Dual-Colored Power LED ........................................................................60
43. Wake from PS/2 Jumper Settings (J2B1) ...................................................................62
44. Wake from USB Jumper Settings (J2B2)....................................................................62
45. BIOS Setup Configuration Jumper Settings (J6D1) ....................................................63
46. Power Usage for a D815EGEW Board .......................................................................67

Contents
ix
47. S3 State Standby Current...........................................................................................67
48. Standby Current Requirements ..................................................................................68
49. Thermal Considerations for Components ...................................................................71
50. D815EGEW Board Environmental Specifications .......................................................72
51. Safety Regulations .....................................................................................................73
52. EMC Regulations........................................................................................................73
53. Supervisor and User Password Functions ..................................................................83
54. BIOS Setup Program Menu Bar .................................................................................85
55. BIOS Setup Program Function Keys ..........................................................................86
56. Maintenance Menu .....................................................................................................86
57. Extended Configuration Submenu ..............................................................................87
58. Main Menu..................................................................................................................88
59. Advanced Menu..........................................................................................................89
60. PCI Configuration Submenu .......................................................................................90
61. Boot Configuration Submenu......................................................................................91
62. Peripheral Configuration Submenu.............................................................................92
63. IDE Configuration Submenu .......................................................................................94
64. Primary/Secondary IDE Master/Slave Submenus.......................................................95
65. Diskette Configuration Submenu ................................................................................97
66. Event Log Configuration Submenu .............................................................................98
67. Video Configuration Submenu....................................................................................99
68. Security Menu ..........................................................................................................100
69. Power Menu .............................................................................................................101
70. ACPI Submenu.........................................................................................................102
71. Boot Menu................................................................................................................103
72. Boot Device Priority Submenu..................................................................................104
73. Hard Disk Drives Submenu ......................................................................................105
74. Removeable Devices Submenu................................................................................105
75. ATAPI CDROM Drives Submenu .............................................................................106
76. Exit Menu .................................................................................................................106
77. BIOS Error Messages...............................................................................................107
78. Uncompressed INIT Code Checkpoints....................................................................109
79. Boot Block Recovery Code Checkpoints ..................................................................109
80. Runtime Code Uncompressed in F000 Shadow RAM ..............................................110
81. Bus Initialization Checkpoints ...................................................................................113
82. Upper Nibble High Byte Functions............................................................................113
83. Lower Nibble High Byte Functions............................................................................114
84. Beep Codes..............................................................................................................115

Intel Desktop Board D815EGEW Technical Product Specification
x

11
1 Product Description
What This Chapter Contains
1.1 Overview ....................................................................................................................12
1.2 Online Support ...........................................................................................................16
1.3 Operating System Support .........................................................................................16
1.4 Design Specifications .................................................................................................17
1.5 Processor ...................................................................................................................19
1.6 System Memory .........................................................................................................20
1.7 Intel®815EG Chipset.................................................................................................22
1.8 I/O Controller ..............................................................................................................24
1.9 Graphics Subsystem ..................................................................................................26
1.10 Audio Subsystem........................................................................................................29
1.11 LAN Subsystem (Optional) .........................................................................................31
1.12 Fan Control and Monitoring ........................................................................................32
1.13 Power Management ...................................................................................................32

Intel Desktop Board D815EGEW Technical Product Specification
12
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the D815EGEW board’s major features.
Table 1. Feature Summary
Form Factor microATX (9.20 inches by 7.65 inches)
Processor Support for either an Intel®Pentium®III processor in a Flip Chip Pin Grid Array
(FC-PGA) package or an Intel®Celeron®processor in an FC-PGA package
Memory • Two 168-pin SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for up to 512 MB system memory
• Support for single-sided or double-sided DIMMs
Chipsets • The D815EGEW board includes the Intel 815EG Chipset, consisting of:
 Intel®82815G Graphics and Memory Controller Hub (GMCH)
 Intel®82801BA I/O Controller Hub (ICH2)
 Intel®82802AB 4 Mbit Firmware Hub (FWH)
I/O Control National Semiconductor PC87360 LPC bus I/O controller
Video Intel 82815G integrated graphics support
Audio • Intel 82801BA ICH2 digital controller (AC link output)
• Analog Devices AD1885 Audio Codec
Peripheral
Interfaces
• Two Universal Serial Bus (USB) ports
• One serial port
• One parallel port
• Two IDE interfaces with Ultra DMA, ATA-66/100 support
• One diskette drive interface
• PS/2†keyboard and mouse ports
Expansion
Capabilities
Four PCI bus add-in card connectors (PCI bus connector 2 includes SMBus
signals and is S5 wake-enabled)
BIOS • Intel/AMI BIOS (Intel 82802AB 4 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
Instantly Available
PC
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PS/2 keyboard and USB ports
For information about Refer to
The board’s compliance level with ACPI, Plug and Play, and SMBIOS Table 3, page 17

Product Description
13
1.1.2 Manufacturing Options
Table 2 describes the D815EGEW board’s 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
LAN Subsystem Intel®82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
Chassis Fan
Connector
Connector for an additional cooling fan
Chassis Intrusion
Connector
Connector for sensing chassis intrusion
SCSI LED
Connector
Allows add-in SCSI host bus adapters to use the same LED as the onboard I/O
controller
Speaker 47 Ωinductive speaker that provides audible error code (beep code) information
during Power On Self Test (POST)
Standby power
indicator LED
Shows that power is still present at the DIMM and PCI bus connectors, even when
the computer appears to be off
Wake on LAN†
Technology
Connector
Support for system wake up using an add-in network interface card with remote wake
up capability

Intel Desktop Board D815EGEW Technical Product Specification
14
1.1.3 Board Layout
Figure 1 shows the location of the major components on the D815EGEW board.
OM12802
C
H
G
E
F
L
PN
O
MK J
BA
W
I
S
V
U
R
Q
T
D
A AD1885 audio codec M Battery
B ATAPI-style audio connectors N Speaker (optional)
C Back panel connectors O SCSI LED connector (optional)
D Wake from PS/2 and USB jumper blocks P Front panel connector
E Processor fan connector Q Chassis intrusion connector (optional)
F BIOS Setup Configuration jumper R Front panel power LED connector
G Intel 82815G GMCH S Chassis fan connector (optional)
H Processor socket T Wake on LAN technology connector (optional)
I DIMM sockets U Intel 82801BA I/O Controller Hub (ICH2)
J Power connector V Intel 82802AB 4 Mbit Firmware Hub (FWH)
K Diskette drive connector W PCI bus add-in card connectors
L IDE connectors
Figure 1. Board Components

Product Description
15
1.1.4 Block Diagram
Figure 2 is a block diagram of the major functional areas of the D815EGEW board.
815EG Chipset
82801BA
I/O Controller Hub
(ICH2)
82815G
Graphics and
Memory Controller
Hub (GMCH)
82802AB 4 Mbit
Firmware Hub
(FWH)
AHA
Bus
System BusProcessor Socket
DIMM
Banks
(2)
Primary/
Secondary IDE
Diskette Drive
Connector
LPC I/O
Controller
PS/2 Keyboard
PS/2 Mouse
Parallel Port
Serial Port A
ATA-66/100
USB
LPC
Bus
OM12839
SDRAM Bus
USB Ports (2)
VGA Port Video
Bus
PCI Slot 1
PCI Slot 2
PCI Slot 3
Optional
Mic In
Line Out
CD-ROM
Line In
LAN
Connector
Physical
Layer
Interface
Network
Analog
Codec
indicates connector or socket
Auxiliary Line In
PCI Slot 4
PCI
Bus
SM Bus
AC
Link
Figure 2. Block Diagram for the D815EGEW Board

Intel Desktop Board D815EGEW Technical Product Specification
16
1.2 Online Support
To find information about… Visit this World Wide Web site:
Intel’s D815EGEW board under “Product Info”or
“Customer Support”
http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
Processor data sheets http://www.intel.com/design/litcentr
ICH2 addressing http://developer.intel.com/design/chipsets/datashts
Custom splash screens http://intel.com/design/motherbd/gen_indx.htm
Audio software and utilities http://www.intel.com/design/motherbd
LAN software and drivers http://www.intel.com/design/motherbd
1.3 Operating System Support
The D815EGEW board supports drivers for all of the onboard hardware and subsystems under the
following operating systems:
• Microsoft Windows†98SE –ACPI mode
• Windows ME
• Windows NT†4.0
• Windows 2000
• Windows XP
For information about Refer to
Supported drivers Section 1.3
✏ NOTE
Third party vendors may offer other drivers.

Product Description
17
1.4 Design Specifications
Table 3 lists the specifications applicable to the D815EGEW board.
Table 3. Specifications
Reference
Name
Specification
Title
Version, Revision Date,
and Ownership
The information is
available from…
AC ’97 Audio Codec ’97 Revision 2.1,
May 1998,
Intel Corporation.
ftp://download.intel.com/ial/
scalableplatforms/ac97r22.pdf
ACPI Advanced Configuration
and Power Interface
Specification
Version 2.0,
July 27, 2000,
Compaq Computer
Corporation,
Intel Corporation,
Microsoft Corporation,
Phoenix Technologies
Limited, and
Toshiba Corporation.
http://www.teleport.com/~acpi/
AMI BIOS American Megatrends
BIOS Specification
AMIBIOS 99,
1999,
American Megatrends, Inc.
http://www.amij.com/amibios/
bios.platforms.desktop.html
ATA/
ATAPI-5
Information Technology -
AT Attachment with Packet
Interface - 5
(ATA/ATAPI-5)
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
http://www.t13.org
ATX ATX Specification Version 2.03,
December 1998,
Intel Corporation.
http://www.teleport.com/
~ffsupprt/
BIS Boot Integrity Services Version 1.0 for WfM 2.0
August 1999,
Intel Corporation.
http://developer.intel.com/
design/security/bis/
bisfaq.htm
EPP IEEE Std 1284.1-1997
(Enhanced Parallel Port)
Version 1.7,
1997,
Institute of Electrical and
Electronic Engineers.
http://standards.ieee.org/
reading/ieee/std_public/
description/busarch/
1284.1-1997_desc.html
El Torito Bootable CD-ROM Format
Specification
Version 1.0,
January 25, 1995,
Phoenix Technologies
Limited and International
Business Machines
Corporation.
http://www.ptltd.com/techs/
specs.html
LPC Low Pin Count Interface
Specification
Version 1.0,
September 29, 1997,
Intel Corporation.
http://www.intel.com/
design/chipsets/industry/
lpc.htm
MicroATX microATX Motherboard
Interface Specification
Version 1.0,
December 1997,
Intel Corporation.
http://www.teleport.com/
~ffsupprt/spec/
microatxspecs.htm
continued

Intel Desktop Board D815EGEW Technical Product Specification
18
Table 3. Specifications (continued)
Reference
Name
Specification
Title
Version, Revision Date and
Ownership
The information is
available from…
PCI PCI Local Bus
Specification
Version 2.2,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/
PCI Bus Power
Management Interface
Specification
Version 1.1,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/
Plug and
Play
Plug and Play BIOS
Specification
Version 1.0a,
May 5, 1994,
Compaq Computer Corporation,
Phoenix Technologies Limited,
and Intel Corporation.
http://www.microsoft.com/
hwdev/respec/
pnpspecs.htm
SDRAM PC SDRAM Unbuffered
DIMM Specification
Revision 1.0,
February 1998,
Intel Corporation.
http://www.intel.com/
technology/memory
PC SDRAM Specification Revision 1.7,
November 1999,
Intel Corporation.
http://www.intel.com/
technology/memory
PC Serial Presence
Detect (SPD)
Specification
Revision 1.2B,
November 1999,
Intel Corporation.
http://www.intel.com/
technology/memory
SMBIOS System Management
BIOS
Version 2.3.1,
March 16, 1999,
American Megatrends
Incorporated,
Award Software International
Incorporated,
Compaq Computer Corporation,
Dell Computer Corporation,
Hewlett-Packard Company,
Intel Corporation,
International Business Machines
Corporation,
Phoenix Technologies Limited,
and SystemSoft Corporation.
http://developer.intel.com/
ial/wfm/design/smbios
UHCI Universal Host Controller
Interface Design Guide
Revision 1.1,
March 1996,
Intel Corporation.
http://www.usb.org/
developers
USB Universal Serial Bus
Specification
Version 1.1,
September 23, 1998,
Compaq Computer Corporation,
Intel Corporation,
Microsoft Corporation, and
NEC Corporation.
http://www.usb.org/
developers
WfM Wired for Management
Baseline
Version 2.0,
December 18, 1998,
Intel Corporation.
http://developer.intel.com/
ial/WfM/wfmspecs.htm

Product Description
19
1.5 Processor
CAUTION
Use only the processors listed below. Use of unsupported processors can damage the board, the
processor, and the power supply. See the Intel®Desktop D815EGEW Specification Update for the
most up-to-date list of supported processors for the D815EGEW board.
The D815EGEW board supports a single Pentium III or Celeron processor. The system bus
frequency is automatically selected. The board supports the processors listed in Table 4.
Table 4. Supported Processors
Type Designation System Bus Frequency L2 Cache Size
1.00, 1.13, and 1.20 GHz 133 MHz 256 KBPentium III processor in
an FC-PGA2 package 1.10 GHz 100 MHz 256 KB
533EB, 600EB, 667, 733,
800EB, 866, and 933 MHz
1.00 and 1.13 GHz
133 MHz 256 KBPentium III processor in
an FC-PGA package
500E, 550E, 600E, 650, 700,
750, 800, 850, and 900 MHz
1.00 and 1.10 GHz
100 MHz 256 KB
1.20 GHz 100 MHz 256 KB
800, 850, 900, and 950 MHz
1.00 and 1.10 GHz
100 MHz 128 KB
Celeron processor in an
FC-PGA package
533A, 566, 600, 633, 667, 700,
733, and 766 MHz
66 MHz 128 KB
All supported onboard memory can be cached, up to the cachability limit of the processor. See the
processor’s data sheet for cachability limits.
For information about Refer to
Processor support Section 1.2, page 16
Processor data sheets Section 1.2, page 16

Intel Desktop Board D815EGEW Technical Product Specification
20
1.6 System Memory
CAUTION
Before installing or removing memory, make sure that AC power is disconnected by unplugging
the power cord from the computer. Failure to do so could damage the memory and the board.
✏ 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.
However, DIMMs may not function under the determined frequency.
✏ NOTE
Because the main system memory is also used as video memory, the board requires a 100 MHz
SDRAM DIMM even though the host bus frequency is 66 MHz. It is highly recommended that an
SPD DIMM be used, since this allows the BIOS to read the SPD data and program the chipset to
accurately configure memory settings for optimum performance. If non-SPD memory is installed,
the BIOS will attempt to correctly configure the memory settings, but performance and reliability
may be impacted.
The D815EGEW board has two DIMM sockets and supports the following memory features:
• 3.3 V (only) 168-pin SDRAM DIMMs with gold-plated contacts
• Unbuffered single-sided or double-sided DIMMs
• Capacity:
 Maximum system memory: 512 MB
 Minimum system memory: 64 MB
• 133 MHz SDRAM or 100 MHz SDRAM
• Serial Presence Detect (SPD) and non-SPD memory
• Non-ECC and ECC DIMMs (ECC DIMMs will operate in non-ECC mode only)
• Suspend to RAM
When installing memory, note the following:
• Non-SPD DIMMs will always revert to a 100 MHz with 3-3-3 timing SDRAM bus.
• Mixing Non-SPD DIMMs with SPD DIMMs will always revert to a 100 MHz with 3-3-3
timing SDRAM bus.
• The BIOS will not initialize installed memory above 512 MB. At boot, the BIOS displays a
message indicating that any installed memory above 512 MB has not been initialized.
• Mixed memory speed configurations (133 and 100 MHz) will default to 100 MHz.
• 133 MHz SDRAM operation requires a 133 MHz system bus frequency processor.
• 100 MHz SDRAM may be populated with four rows of SDRAM (two double-sided DIMMs).
For information about Refer to
Obtaining the PC Serial Presence Detect (SPD) Specification Table 3, page 17