Asus M4A78-EM/1394 - Manual (Page 24)

1.7.2 Memory configurations
You may install 512MB, 1GB, 2GB and 4GB unbuffered ECC and 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:
- Install a maximum of 3GB system memory if you are using a 32-bit Windows ®
OS.
- Use a 64-bit Windows ® OS if you want to install 4GB or more memory on the
motherboard.
• This motherboard does not support DIMMs made up of 256 megabits (Mb) chips or less.
The motherboard supports up to 16GB memory modules on Windows ® XP Professional x64
and Vista x64 editions. You may install a maximum of 4GB DIMMs on each slot.
M4A78-EM/1394 Motherboard Qualified Vendors Lists (QVL)
DDR2-1200MHz capability
Size Vendor Part No. SS/DS CL Chip NO. Chip Brand
DIMM socket
support (Optional)
A* B* C*
2048MB(Kit of 2) Kingston KHX96002K2/2G DS 5-5-5-15 Heat-Sink Package N/A · ·
2048MB(Kit of 2) OCZ OCZ2FX12002GK DS 5-5-5-18 Heat-Sink Package N/A · ·
2048MB(Kit of 2) Team TXDD1024M1300HC6 DS 6-6-6-18 Heat-Sink Package Heat-Sink Package ·
DDR2-1066MHz capability
Size Vendor Part No. SS/DS CL Chip NO. Chip Brand
DIMM socket
support
(Optional)
A* B* C*
4096MB(Kit of 2) A-Data AD21066E002GU DS 5-5-5-15 Heat-Sink Package N/A · · ·
2048MB(kit of 2) Apacer 78.0AG9S.9K4 DS 5-5-5-15 Heat-Sink Package N/A · ·
4096MB(kit of 2) Apacer 78.AAGAL.9KZ DS 5-5-5-15 Heat-Sink Package N/A · · ·
1024MB Corsair CM2X1024-8500C5 DS N/A Heat-Sink Package Corsair · ·
2048MB(Kit of 2) Corsair CM2X1024-8500C5D DS 5-5-5-15 Heat-Sink Package N/A · · ·
2048MB(Kit of 2) Corsair CM2X2048-8500C5D DS 5-5-5-15 Heat-Sink Package N/A · · ·
1024MB Crucial BL12864AA1065.8FE5 SS N/A Heat-Sink Package N/A · ·
2048MB Crucial CT25664AA1067.16FE1 DS 7-7-7-13 9DJKH D9JKH Micron ·
2048MB(kit of 2) G.SKILL F2-8500CL5D-2GBPI SS 5-5-5-15 Heat-Sink Package N/A ·
1024MB G.SKILL F2-8500CL5S-1GBPK DS 5-5-5-15 Heat-Sink PackageSN:815130037562 N/A · · ·
2048MB(Kit of 2) G.SKILL F2-8500CL5D-2GBPK DS 5-5-5-15 Heat-Sink Package N/A · · ·
4096MB(Kit of 2) G.SKILL F2-8500CL5D-4GBPI-B DS 5-5-5-15 Heat-Sink Package N/A ·
4096MB(Kit of 2) G.SKILL F2-8500CL5D-4GBPI DS 5-5-5-15 Heat-Sink Package N/A · · ·
(continued on the next page)
We recommend that you install the DDR2 1200 memory modules on the yellow slots for
better performance.
Chapter 1: Product introduction 1-12