1-12 Chapter 1: Product introduction
• 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 conguration. 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.
• This motherboard does not support memory modules made up of
128 Mb chips or double sided x16 memory modules.
1.7.2 Memory configurations
You may install 256 MB, 512 MB, and 1 GB unbuffered/ECC/non-ECC DDR2
DIMMs into the DIMM sockets.
1.7 System memory
1.7.1 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 gure illustrates the location of the DDR2 DIMM sockets:
Channel Sockets
Channel A DIMM_A1
Channel B DIMM_B1
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