Asus M2N-XE - Manual (Page 24)

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
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.
• 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, 1 GB, and 2GB 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 figure illustrates the location of the DDR2 DIMM sockets:
Channel Sockets
Channel A DIMM_A1
Channel B DIMM_B1
M2N-XE
M2N-XE 240-pin DDR2 DIMM Sockets
128 Pins
112 Pins
DIMM_B1 DIMM_A1