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1 overview – Asus P5B Deluxe/WiFi-AP User Manual

Page 39

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ASUS P5B Deluxe

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2.4

System memory

2.4.1

Overview

The motherboard comes with four Double Data Rate 2 (DDR2) Dual Inline Memory

Modules (DIMM) sockets.
A DDR2 module has the same physical dimensions as a DDR DIMM but has a

240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched

differently to prevent installation on a DDR DIMM socket.
The figure illustrates the location of the DDR2 DIMM sockets:

2.4.2

Memory configurations

You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered non-ECC DDR2

DIMMs into the DIMM sockets.

• You may install varying memory sizes in Channel A and Channel B. The

system maps the total size of the lower-sized channel for the dual-channel

configuration. Any excess memory from the higher-sized channel is then

mapped for single-channel operation.

• Always install DIMMs with the same CAS latency. For optimum

compatibility, it is recommended that you obtain memory modules from the

same vendor.

• Due to chipset resource allocation, the system may detect less than 8 GB

system memory when you installed four 2 GB DDR2 memory modules.

• This motherboard does not support memory modules made up of 128 Mb

chips or double sided x16 memory modules.

Channel

Sockets

Channel A

DIMM_A1 and DIMM_A2

Channel B

DIMM_B1 and DIMM_B2

P5B Deluxe

®

P5B Deluxe 240-pin DDR2 DIMM sockets

DIMM_A2

DIMM_A1

DIMM_B2

DIMM_B1

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