Asus M3N78-AM - Manual (Page 22)

1.7.2 Memory configurations
You may install 256MB, 512MB, 1GB, 2GB, and 4GB unbuffered ECC/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, we
recommend that you obtain memory modules from the same vendor.
• Due to the memory address limitation on 32-bit Windows ® OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you do any of the
following:
- Use a maximum of 3GB system memory if you are using a 32-bit Windows ® OS.
- Install a 64-bit Windows ® OS when you want to install 4GB or more memory on
the motherboard.
• This motherboard does not support DIMMs made up of 256 megabits (Mb) or less.
The motherboard supports up to 8GB memory modules on Windows ® XP Professional x64
and Vista x64 editions. You may install a maximum of 2 GB DIMMs on each slot.
M3N78-AM Motherboard Qualified Vendors Lists (QVL)
DDR2-1066MHz capability
The default DIMM frequency depends on its Serial Presence Detect (SPD), which is the
standard way of accessing information from a memory module. Under the default state,
some memory modules for overclocking may operate at a lower frequency than the vendor-
marked value.
Vendor Part No. Size
SS/
DS
CL Chip No.
Chip
Brand
DIMM
support
A* B*
Corsair CM2X1024-8500C5 1G DS N/A Heat-Sink Package N/A • •
OCZ OCZ2N1066SR2DK 2G(kit of 2) DS 5-5-5-15 Heat-Sink Package(EPP) SN:00482080600160-1 OCZ • •
GEIL GB24GB8500C5QC 1G SS 5 GL2L128M88BA25AB GEIL • •
1-12 ASUS M3N78-AM