Asus M4A78-AM - Manual (Page 22)

1.7.2 Memory configurations
You may install 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 4GB DIMMs on each slot.
M4A78-AM Motherboard Qualified Vendors Lists (QVL)
DDR2-1200(O.C.) MHz capability
Vendor Part No. Size
SS/
DS
Chip
Brand
Chip NO. “Timing
DIMM support
A* B*
A-Data AD21066E002GU 4096MB(2x2GB) DS N/A Heat-Sink Package 5-5-5-15 • •
Apacer 78.AAGAL.9KZ 4096MB(2x2GB) DS N/A Heat-Sink Package 5-5-5-15 • •
Corsair CM2X1024-8500C5 1024MB DS Corsair Heat-Sink Package • •
Corsair CM2X1024-8500C5D 2048MB(2x1GB) DS N/A Heat-Sink Package 5-5-5-15 •
Corsair CM2X2048-8500C5D 2048MB(2x1GB) DS N/A Heat-Sink Package 5-5-5-15 • •
Crucial BL12864AA1065.8FE5 1024MB SS N/A Heat-Sink Package • •
Crucial CT25664AA1067.16FE1 2048MB DS Micron 9DJKH D9JKH 7-7-7-13 • •
G.SKILL F2-8500CL5S-1GBPK 1024MB DS N/A Heat-Sink
PackageSN:815130037562
5-5-5-15 • •
G.SKILL F2-8500CL5D-2GBPK 2048MB(2x1GB) DS N/A Heat-Sink Package 5-5-5-15 • •
G.SKILL F2-8500CL5D-4GBPI 4096MB(2x2GB) DS N/A Heat-Sink Package 5-5-5-15 • •
G.SKILL F2-8500CL5D-4GBPK 4096MB(2x2GB) DS N/A Heat-Sink Package 5-5-5-15 •
GEIL GE22GB1066C5DC 1024MB SS GEIL Heat-Sink Package 5 •
GEIL GE24GB1066C5QC 1024MB SS GEIL Heat-Sink Package 5 • •
GEIL GX24GB8500C5UDC 4096MB(2x2GB) DS N/A Heat-Sink Package 5 •
(continued on the next page)
Vendor Part No. Size SS/DS
Chip
Brand
Chip NO. “Timing
DIMM support
A* B*
Kingston KHX96002K2/2G 2048MB(2x1GB) DS N/A Heat-Sink Package 5-5-5-15 • •
OCZ OCZ2FX12002GK 2048MB(2x1GB) DS N/A Heat-Sink Package 5-5-5-18 • •
Team TXDD1024M1300HC6 2048MB(2x1GB) DS N/A Heat-Sink Package 6-6-6-18 • •
DDR2-1066MHz capability
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