The D845EBG2 and D845EPT2 boards support the Intel® Pentium® 4 processor in the 478-pin package. For a detailed list of the supported processors, refer to the processor support table in the Components section of this integration guide. Refer to the Pentium 4 processor page for detailed processor installation information.

Note: The processor fan heatsink power cable should be installed into the fan power header labeled CPU Fan.

Due to the layout of the board, it is recommended to install memory in the DIMM sockets prior to installing the AGP video card to avoid interference with the memory retention mechanism. The boards' two DIMM sockets are arranged as banks 0 and 1. If installing a single DIMM, install it in bank 0.

Some chassis are equiped with three wire rear chassis fans that that produce a tachometer output signal for tacking fan speed. These rear chassis fans should use the appropriate fan headers labeled "REAR FAN" (J1B1).

The D845EBG2 and D845EPT2 boards supports Ultra ATA/66 (DMA Mode 4) and Ultra ATA/100 (DMA Mode 5) operation. If you are using an Ultra ATA/66 or Ultra ATA/100 hard drive, you must use the 40-pin, 80-conductor IDE cable which ships with the boards. The board and the cable are backward compatible with previous transfer protocols. Install the IDE cable in the following orientation:

1. Plug the blue connector at the end of the cable into the desktop board.
2. Plug the black (end) connector into the master drive.
3. Plug the grey (middle) connector into the slave drive, if it is present.

Note: For best performance, place Ultra ATA/66/100 devices on the primary IDE channel and non-Ultra ATA/66/100 devices on the secondary IDE channel.

Some older operating systems require that an additional audio cable be connected from the CD-ROM drive to the motherboard in order listen to CD's directly from the CD-ROM drive. In this situation, connect the CD-ROM audio cable to the connector labeled "CD IN".