Asus M3N78-AM - Manual (Page 27)

ASUS M3N78-AM 1-15
• For dual-channel configuration, install identical DIMMs in DIMM_A1 and
DIMM_B1.
• 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 you install a total memory of 4GB or more, a Windows ® 32-bit
operation system may only recognize less than 3GB. Hence, a total
installed memory of less than 3GB is recommended if you are using a
Windows 32-bit operation system.
64-bit
Windows ® XP Professional x64 Edition
Windows ® Vista x64 Edition
The motherboard can support 8GB physical memory on the operating system
listed below. You may install a maximum of 4GB DIMM on each slot.
1.7.2 Memory configurations
You may install 256MB, 512MB, 1GB, 2GB, and 4GB unbuffered ECC and
non-ECC DDR2 DIMMs into the DIMM sockets.