Asus M2N68-AM - Manual (Page 26)

1-14 Chapter 1: Product introduction
• When using only one memory module, start installing the DDR2 DIMM from
slot DIMM_A1 or DIMM_B1 for better overclocking capability.
• Always use identical DDR2 DIMM pairs for dual channel mode. For
optimum compatibility, we recommend that you obtain memory modules
from the same vendor.
• When installing total memory of 4GB capacity or more, Windows 32-
bit operation system may only recognize less than 3GB. Hence, a total
installed memory of less than 3GB is recommended.
The motherboard can support 4 GB physical memory on the operating system
listed below. You may install a maximum of 2 GB DIMMs on each slot.
64-bit
Windows ® XP Professional x64 Edition
Windows ® Vista x64 Edition
1.7.2 Memory configurations
You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered non-ECC DDR2
DIMMs into the DIMM sockets.
Recommended memory configurations
Mode
Sockets
DIMM_A1 DIMM_B1
Single-Channel
– Populated
Populated –
Dual-channel Populated Populated