Before You Begin - Warning and Cautions

WARNING Disconnect the desktop 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. 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 do not have overcurrent protection. 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.

Introduction
The following is a step-by-step integration guide that provides basic information needed to correctly build an Pentium® 4 processor system based on an Intel® Desktop Board. The following boards are covered:

• Intel® Desktop Board D875PBZ
• Intel® Desktop Board D865GBF
• Intel® Desktop Board D865GLC
• Intel® Desktop Board D865PERL
• Intel® Desktop Board D845GEBV2
• Intel® Desktop Board D845GERG2
• Intel® Desktop Board D845PEBT2
• Intel® Desktop Board D845PESV

Figure 1: Installing the I/O shield.

• Intel® Desktop Board D845GEBV2
• Intel® Desktop Board D845GERG2
• Intel® Desktop Board D845PEBT2
• Intel® Desktop Board D845PESV

Intel Desktop Boards D875PBZ, D865GBF, D865GLC, D865PERL
These boards have four DIMM sockets arranged as DIMM 0 and DIMM 1 in both Channel A and Channel B.

Dual Channel Configuration
Install a matched pair of DIMMs (equal in speed: 266MHz PC2100, 333MHz PC2700, or 400MHz PC3200; density: 64 MB, 128 MB, 256 MB, 512 MB, or 1 GB; and technology: 128 Mb, 256 Mb, or 512 Mb) in DIMM 0 in both Channels A and B. If additional memory is to be used, then install another matched pair of DIMMs in DIMM 1 in both Channels A and B.



Figure 2: Installing DIMMs


Notes:
• All other memory configurations will result in single channel memory operation.
• The Intel® Desktop Board D875PBZ supports 333 MHz PC2700 and 400 MHZ PC3200 DDR memory modules only.
Intel Desktop Boards D845GEBV2, D845GERG2, D845PEBT2, D845PESV
These boards have two DIMM sockets arranged as Banks 0 and 1. If installing a single DIMM, install it in Bank 0. If your board includes an AGP slot, install memory in the DIMM sockets prior to installing the AGP video card to avoid interference with the memory retention mechanism.



Figure 3: Installing a single DIMM.

Intel Desktop Boards D845GEBV2, D845GERG2, D845PEBT2, D845PESV
The AGP connector supports 1.5V 4X and 2X AGP cards. The connector is keyed so that only 1.5V AGP cards may be installed. It should be noted that there are currently AGP cards available that are keyed for 1.5V connectors, but they can be configured to run at 3.3V. It is important to only use the latest AGP cards that support 1.5V 4X and 2X cards.

Intel Desktop Boards D875PBZ, D865GBF, D865GLC, D865PERL
The AGP connector supports 1.5V 8X and 4X AGP cards. The connector is keyed so that only 1.5V AGP cards may be installed. It should be noted that there are currently AGP cards available that are keyed for 1.5V connectors, but they can be configured to run at 3.3V. It is important to only use the latest AGP cards that support 1.5V 8X and 4X cards.

ATA Drives
Intel Desktop Boards support Ultra ATA/66 and Ultra ATA/100 transfer rates. If you are using an Ultra ATA/66 or Ultra ATA/100 hard drive, you must use the 40-pin, 80-conductor IDE cable. Both the board and the cable are backward compatible with previous IDE transfer protocols. Install the IDE cable in the following orientation:
1. Attach the cable end with the single connector (A) to the board.
2. Attach the cable end with the two closely spaced connectors (B) to the drives.



Figure 4: Attaching an IDE drive



Serial ATA Drive (Optional)
For the Intel® Desktop Boards supporting Serial ATA, one or two (optional) SATA cables are included. The cable (4-conductor) supports the Serial ATA protocol and connects a single drive to the desktop board. Either end of the cable can be connected to the SATA drive or the connector on the board. Some Serial ATA drives may require a power adapter cable. Contact the manufacturer of the SATA drive to determine the best method for powering the SATA drive.

For correct SATA cable function:
1. Attach a cable end to the connector (A) on the board.
2. Attach the other cable end (B) to the drive.



Figure 5: Attaching the Serial ATA cable.



Intel does not support the use of IDE to serial-ATA converters, however limited testing indicates that such converters may work with the Serial ATA feature of Intel® Desktop Boards. The IDE drive may need to be configured as a SINGLE drive (usually by setting a jumper). The drive may not be recognized by the system if it is set as Master, Slave, or Cable Select (CS).

For additional information on Serial ATA, refer to Information on Using Serial ATA Hard Drives.

This applies to:

Intel® Desktop Board D845GEBV2 Intel® Desktop Board D845GERG2 Intel® Desktop Board D845PEBT2 Intel® Desktop Board D845PESV Intel® Desktop Board D865GBF Intel® Desktop Board D865GLC Intel® Desktop Board D865PERL Intel® Desktop Board D875PBZ