Intel D845PT User manual

Intel®Desktop Boards
D845PT and D845BG
Quick Reference
This guide is written for technically qualified personnel with experience
installing and configuring desktop boards.
Before You Begin
Warning and Caution .......................................................................... 3
Safety and Regulatory Notice.............................................................. 3
Desktop Board Components
D845PT Board Components ............................................................... 4
D845BG Board Components............................................................... 6
D845BG Board Components............................................................... 6
Supported Components......................................................................... 8
Installation Steps
1 Installing the I/O Shield ................................................................. 9
2 Installing the Desktop Board......................................................... 10
3 Installing the Processor Fan Heatsink Base................................... 11
4 Installing the Processor ................................................................. 13
5 Installing the Processor Fan Heatsink ........................................... 13
6 Installing the Memory Modules .................................................... 13
7 Installing the AGP Card Retntion Mechanism .............................. 15
8 Installing an AGP Card ................................................................. 17
9 Connecting the Fans...................................................................... 17
10 Attaching the IDE Drives............................................................. 18
Setting the BIOS Configuration Jumper Block ............................... 19
Items on the Intel®Express Installer CD-ROM
• Product warranty
• Intel Express Installer
• Intel®Desktop Boards D845PT and D845BG Product Guide
• Software utilities and drivers
• Software license agreement
• Readme file
Part Number: A72166-001

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View or download product support information from Intel’s World Wide
Web site:
http://support.intel.com/support/motherboards/desktop/
Follow the link to your Intel Desktop Board for the following information:
x Known Issues and Solutions
x Software and Drivers (latest BIOS and driver updates)
x Compatibility (supported Intel®processors and memory information)
x Product Documentation
Technical Product Specification
Specification Update
If you can’t find the information you need on the Web, contact your point of
purchase. The Intel Web site also includes telephone numbers and billing
charges, if applicable, for Intel customer support.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH
INTEL®PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL
OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED
BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL’S TERMS AND
CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO
LIABILITY WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR
IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL
PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO
FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR
INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL
PROPERTY RIGHT. INTEL PRODUCTS ARE NOT INTENDED FOR USE IN
MEDICAL, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS. INTEL MAY
MAKE CHANGES TO SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT
ANY TIME, WITHOUT NOTICE.
The D845PT and D845BG desktop boards may contain design defects or errors
known as errata which may cause the product to deviate from published
specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest
specifications and before placing your product order.
Copies of documents which have an ordering number and are referenced in this
document, or other Intel literature, may be obtained from Intel Corporation by
going to the World Wide Web site at: http://www.intel.com or by calling
1-800-548-4725.
Intel and Pentium 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

Intel Desktop Boards D845PT and D845BG 3
Quick Reference
Before You Begin
Warning and Caution
WARNING
Disconnect the board’s power supply from its ac power source
before you connect or disconnect cables, or install or remove any
board components. Failure to do this can result in personal injury or
equipment damage. Some circuitry on the desktop board can
continue to operate even though the front panel power switch is off.
CAUTION
Electrostatic discharge (ESD) can damage desktop board components.
Install the board at an ESD-controlled workstation. If such a workstation
is not available, wear an antistatic wrist strap or touch the surface of the
antistatic package before handling the board.
Safety and Regulatory Notice
See the Intel®Desktop Boards D845PT and D845BG Product Guide for all
applicable regulatory compliance statements, product certification markings, and
safety and electromagnetic compatibility (EMC) standards and regulations these
desktop boards are compliant with.
Replacement battery warning label provided: Place the label inside the chassis
in an easy-to-see location near the battery but not on the board itself.
Intended uses: This product was evaluated as information technology
equipment (ITE) for home or office use when installed into an appropriate
computer chassis. Other end uses or locations may require further evaluation.
✏ NOTE
The D845PT board layout was used in all illustrations unless otherwise
noted.

4 Intel Desktop Boards D845PT and D845BG
Quick Reference
Desktop Board Components
D845PT Board Components
OM12642
D
H
F
G
E
RO L
PMN
Z
A
K
AA
WJ
Y
Q
X
S
T
U
I
BC
USB
Devices
USB
Devices
Line
In
2-pin alternate
power/sleep LED
connector
1
3
V
On
Ground
Reset
HD LED
Power LED
No Connection
+5V
21
16 15
continued

Intel Desktop Boards D845PT and D845BG 5
Quick Reference
D845PT Board Components (continued)
A. Analog Devices Inc.
AD1885 codec
B. AGP connector (1.5 V only)
C. CD-ROM connector (ATAPI)
D. Auxiliary line-in connector
(ATAPI)
E. 12 V processor core voltage
connector
F. Rear chassis fan connector
(tachometer input)
G. Intel®82845 Memory Controller
Hub (MCH)
H. Processor socket
I. Processor fan connector
(tachometer input)
J. DIMM sockets
K. Serial port B connector
L. Power connector
M. Secondary IDE connector
N. Primary IDE connector
O. Diskette drive connector
P. Firmware Hub (FWH)
Q. Intel®82801BA I/O Controller
Hub (ICH2)
R. BIOS configuration jumper block
S. SCSI hard drive activity LED
connector
T. Speaker
U. Chassis intrusion connector
V. Front chassis fan connector
W. Front panel USB connector
X. Battery
Y. PCI bus add-in card connectors
Z. Communication and Networking
Riser (CNR) (optional)
AA. Front panel audio connector
CAUTION
Many of the midboard and front panel connectors provide operating
voltage (+5 V dc and +12 V dc, for example) to devices inside the
computer chassis, such as fans and internal peripherals. These
connectors are not overcurrent protected. Do not use these connectors
for powering devices external to the computer chassis. A fault in the load
presented by the external devices could cause damage to the computer,
the interconnecting cables, and the external devices themselves.

6 Intel Desktop Boards D845PT and D845BG
Quick Reference
D845BG Board Components
OM12643
USB
Devices
USB
Devices
Line
In
D
H
F
G
E
ROL PMN
A
K
AA
WJ
Y
Q
X
S
T
U
I
BC
V
Z
2-pin alternate
power/sleep LED
connector
1
3
On
Ground
Reset
HD LED
Power LED
No Connection
+5V
21
16 15
continued

Intel Desktop Boards D845PT and D845BG 7
Quick Reference
D845BG Board Components (continued)
A. Analog Devices Inc. AD1885
codec
B. AGP connector (1.5 V only)
C. CD-ROM connector (ATAPI)
D. Auxiliary line-in connector
(ATAPI)
E. 12 V processor core voltage
connector
F. Rear chassis fan connector
(tachometer input)
G. Intel 82845 Memory Controller
Hub (MCH)
H. Processor socket
I. Processor fan connector
(tachometer input)
J. DIMM sockets
K. Serial port B connector
L. Power connector
M. Secondary IDE connector
N. Primary IDE connector
O. Diskette drive connector
P. Firmware Hub (FWH)
Q. Intel 82801BA I/O Controller
Hub (ICH2)
R. BIOS configuration jumper
block
S. SCSI hard drive activity LED
connector
T. Speaker
U. Chassis intrusion connector
V. Front chassis fan connector
W. Front panel USB connector
X. Battery
Y. PCI bus add-in card connectors
Z. Communication and Networking
Riser (CNR) (optional)
AA. Front panel audio connector
CAUTION
Many of the midboard and front panel connectors provide operating
voltage (+5 V dc and +12 V dc, for example) to devices inside the
computer chassis, such as fans and internal peripherals. These
connectors are not overcurrent protected. Do not use these connectors
for powering devices external to the computer chassis. A fault in the load
presented by the external devices could cause damage to the computer,
the interconnecting cables, and the external devices themselves.

8 Intel Desktop Boards D845PT and D845BG
Quick Reference
Supported Components
Processors
CAUTION
Failure to use an ATX12V power supply, or not connecting the additional
power supply lead to the D845PT or D845BG board may result in damage
to the desktop board and/or power supply.
For more information on the ATX12V power supply, refer to the Intel
Desktop Boards D845PT and D845BG Product Guide on the Intel
Express Installer CD-ROM.
The board supports the following processors:
Type Designation
System Bus
Frequency
Intel®Pentium®4 processor in
the mPGA-478 pin package
1.4, 1.5, 1.6, 1.7, 1.8,
1.9, and 2.0 GHz
400 MHz
For the latest information on processors supported by the D845PT and
D845BG boards, refer to the Intel customer support World Wide Web site:
http://support.intel.com/support/motherboards/desktop
Memory Module Requirements
The boards supports system memory as defined below:
• Up to two 184-pin Double Data Rate (DDR) SDRAM Dual Inline
Memory Modules (DIMMs) with gold-plated contacts
• DDR200 and DDR266 SDRAM
• 64 Mbit, 128 Mbit, 256 Mbit, and 512 Mbit technologies for the
following memory configurations:
 64 MB (minimum)
 256 MB (64 Mbit technology)
 512 MB (128 Mbit technology)
 1024 MB (256 Mbit technology)
 2048 MB (512 Mbit technology)
✏NOTES
The D845PT and D845BG desktop boards have been designed to support
DIMMs based on 512 Mbit technology up to 2 GB, but this technology has
not been validated on these boards. For more information about the latest
list of tested memory, refer to the Intel customer support World Wide Web
site:
http://support.intel.com/support/motherboards/desktop/
• Unbuffered and non-registered single or double-sided DIMMs

Intel Desktop Boards D845PT and D845BG 9
Quick Reference
• Serial Presence Detect (SPD) memory
• Non-ECC and ECC DIMMs
• 2.5 V memory only
✏NOTES
All memory components and DIMMs used with the desktop boards must
comply with the PC SDRAM specifications. These include the PC
SDRAM Specification (memory component specific), the PC Unbuffered
DIMM Specification. To view or download these specifications, refer to
this Intel World Wide Web site:
http://www.intel.com/technology/memory/pcsdram/
For information about vendors that support these memory requirements,
refer to the D845PT and D845BG link on this Intel World Wide Web site:
http://support.intel.com/support/motherboards/desktop/
Installation Steps
1 Installing the I/O Shield
The board comes with an I/O shield. When installed in the chassis, the shield
blocks radio frequency transmissions, necessary to pass emissions (EMI)
certification testing, protects internal components from dust and foreign objects,
and promotes correct airflow within the chassis.
Install the I/O shield before installing the board in the chassis. Place the shield
inside the chassis as shown in the following figure. Press the shield into place so
that it fits tightly and securely. If the shield doesn’t fit, obtain a properly-sized
shield from the chassis supplier.
OM11543

10 Intel Desktop Boards D845PT and D845BG
Quick Reference
2 Installing the Desktop Board
CAUTION
Failure to use an ATX12V power supply, or not connecting the additional
power supply lead to the D845PT and D845BG boards may result in
damage to the desktop board and/or power supply.
For more information on the ATX12V power supply, refer to the Intel
Desktop Boards D845PT and D845BG Product Guide on the Intel
Express Installer CD-ROM.
Refer to your chassis manual for specific instructions on installing and removing
the board. Secure the board to the chassis standoffs using the screws.
The figure below shows the six mounting holes for the D845PT board.
OM12627
D845PT Board Mounting Holes
The figure below shows the eight mounting holes for the D845BG board.
OM12626
D845BG Board Mounting Holes

Intel Desktop Boards D845PT and D845BG 11
Quick Reference
3 Installing the Processor Fan Heatsink Base
✏ NOTE
The following assembly operation should be performed after the desktop
board is secured in the chassis.
The board comes with the processor fan heatsink base. Follow the instructions
below to install the base to the board.
1. Observe the precautions in “Before You Begin”on page 3.
2. The processor fan heatsink base is secured to the board with four pushpins.
See the location of the processor fan heatsink base mounting holes in the
following figure.
OM12628
3. Remove the four white pushpins from the processor fan heatsink RM base,
if installed.

12 Intel Desktop Boards D845PT and D845BG
Quick Reference
4. Align the four black fasteners (A) of the processor fan heatsink RM base
with the corresponding holes in the desktop board (B). Gently press the
base down until all four corners snap into place. Verify that all four
fasteners are fully engaged.
OM12629
B
A
5 Insert the four white locking pushpins into the fasteners and press down to
fully secure the RM base to the desktop board.
OM12814

Intel Desktop Boards D845PT and D845BG 13
Quick Reference
4 Installing the Processor
Observe the precautions in “Before You Begin”on page 3.
Lift the processor socket lever.
1. Install the processor so that the corner with the triangle marking (A) is
aligned with the corner where the lever is attached to the socket.
2. Lower the lever back to its original position.
OM12078
mPGA478B
mPGA478B
mPGA478B
A
5 Installing the Processor Fan Heatsink
For instructions on how to install the processor fan heatsink, refer to the boxed
processor manual or the Intel customer support World Wide Web site:
http://support.intel.com/support/processors/pentium4/intnotes478.htm
6 Installing the Memory Modules
CAUTION
Install memory in the DIMM sockets prior to installing the AGP video card
to avoid interference with the memory retention mechanism.
The D845PT and D845BG boards require that DIMMs be installed. The two
DIMM sockets are arranged as banks 1 and 0 as shown in the figure below. If
installing a single DIMM, install it in bank 0.
To install DIMMs, follow these steps:
1. Observe the precautions in “Before You Begin”on page 3.
2. Turn off all peripheral devices connected to the computer. Turn off and
unplug the computer.
3. Remove the computer cover and locate the DIMM sockets.
4. Remove the AGP video card (if it interferes with the DIMM clips from
being easily opened and closed).

14 Intel Desktop Boards D845PT and D845BG
Quick Reference
5. Holding the DIMM by the edges, remove it from its antistatic package.
6. Make sure the clips at either end of the socket are pushed away from the
socket as shown above.
7. Position the DIMM above the socket. Align the small notch in the bottom
edge of the DIMM with the key in the socket.
8. Insert the bottom edge of the DIMM into the socket.
9. When the DIMM is inserted, push down on the top edge of the DIMM until
the retaining clips snap into place. Make sure the clips are firmly in place.
10. Reinstall the AGP card if you removed it before installing the DIMMs.
11. Replace the computer cover.

Intel Desktop Boards D845PT and D845BG 15
Quick Reference
7 Installing the AGP Card Retention Mechanism
CAUTION
Install the AGP card retention mechanism (RM) only when using an
AGP card with a retention notch (A) as shown in the figure below. Using
the RM with an unnotched card may impair video operation. See the Intel
Desktop Boards D845PT and D845BG Product Guide on the Intel
Express Installer CD-ROM for RM removal instructions.
✏ NOTE
All D850PT and D850BG desktop boards may not include an AGP RM.
See “Installing an AGP Card” on page 17 if your boxed desktop board
does not include an AGP RM.
OM10592
A
The RM encloses the board’s AGP connector and stabilizes the AGP card. Place
the board (component side up) on a flat, supportive surface. Follow the steps
outlined below to attach the RM (A) to the AGP connector (B):
1. Observe the precautions in “Before You Begin”on page 3.

16 Intel Desktop Boards D845PT and D845BG
Quick Reference
2. Locate the AGP connector on the board as shown below. Note that the
board’s silkscreen (C) indicates the correct final position of the lever (D) on
the RM.
OM12632
CB
A
E
D
3. Position the RM over the AGP connector as shown below.
OM10111
4. Push the lever end of the RM in the direction of the arrow until the two
rearmost tabs (E) spread over the end of the AGP connector.
OM10180
5. Push the free end of the RM over the other end of the AGP connector and
press down evenly on both ends of the RM until all four tabs click
underneath the AGP connector. Do not apply unnecessary pressure to avoid
damaging the board.
OM10181

Intel Desktop Boards D845PT and D845BG 17
Quick Reference
8 Installing an AGP Card
✏ NOTE
The D845PT and D845BG boards are only compatible with 1.5 V AGP
cards.
Follow these instructions to install an AGP card if it has a retention notch.
1. Observe the precautions in “Before You Begin”on page 3.
2. Place the AGP card in the AGP connector.
3. Press down on the card until it is completely seated in the connector and the
card retention notch snaps into place below the RM.
4. Secure the card’s metal bracket to the chassis back panel with a screw.
9 Connecting the Fans
The following figure shows the location of the fan connectors. Connect the
processor’s fan heatsink cable to the processor fan connector on the board.
Connect the chassis fan cables to the board connectors as shown in the figure
below.
OM12644
Chassis Rear
Fan
13
Processor
Fan
1
3
Chassis Front
Fan
1
3
J1D2
J1B2
J8F2

18 Intel Desktop Boards D845PT and D845BG
Quick Reference
10 Attaching the IDE Drives
The Intel®boxed desktop board package includes an IDE cable. The cable can
connect two drives to the desktop board. The cable support the Ultra DMA-33
(40-contact) and ATA-66/100 (40-contact, 80-conductor) transfer protocols and
is backward compatible with drives using slower IDE transfer protocols.
The cable will work correctly only when oriented as shown in the figure below.
For correct cable function:
1. Observe the precautions in “Before You Begin”on page 3.
2. Attach the cable end with the single connector (A) to the board.
3. Attach the cable end with the two closely spaced connectors (B) to the
drives.
OM12633
BA

Intel Desktop Boards D845PT and D845BG 19
Quick Reference
Setting the BIOS Configuration Jumper Block
CAUTION
Always turn off the power and unplug the power cord from the computer
before changing the jumper block settings. Moving the jumper with the
power on may result in unreliable computer operation.
OM12634
31
J6F2

20 Intel Desktop Boards D845PT and D845BG
Quick Reference
The BIOS configuration jumper block determines the operating mode of the
BIOS Setup Program and enables BIOS recovery in the event of a failed
BIOS update. The following table describes the jumper block settings for the
BIOS Setup configuration jumper.
BIOS Setup Configuration Jumper Block (J6F2) Settings
Jumper
Position Mode Description
1
3
Normal
(default)
The BIOS uses the current configuration and
passwords for booting.
1
3
Configure After the Power-On Self-Test (POST) runs, the
BIOS displays the Maintenance Menu. Use this
menu to clear passwords.
1
3
Recovery The BIOS recovers data from a recovery diskette in
the event of a failed BIOS update. To update or
recover the BIOS, see the instructions in the Intel
Desktop Boards D845PT and D45BG Product Guide
on the Intel®Express Installer CD-ROM.
For a complete list of BIOS Setup settings, see:
• The Intel Dekstop Boards D845PT and D845BG Product Guide on the
Intel Express Installer CD-ROM
• The Intel customer support World Wide Web Site at
http://support.intel.com/support/motherboards/desktop/