Asus M4A78 PLUS - Motherboard - ATX - Memory Configurations

1.7.2 Memory congurations
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 conguration. 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 16GB memory modules on Windows
®
XP Professional x64
and Vista x64 editions. You may install a maximum of 4GB DIMMs on each slot.
M4A78 PLUS Motherboard Qualied Vendors Lists (QVL)
DDR2-667MHz capability
Size Vendor Part No.
SS/
DS
CL Chip No.
Chip
Brand
DIMM support
A* B* C*
2G Kingston KVR667D2N5/2G DS N/A 7RE22 D9HNL Micron · · ·
512MB Kingston KVR667D2N5/512 SS N/A SO1237650821 SBP D6408TR4C
GL25USL074905PECNB
Kingston · · ·
2G Kingston KVR667D2N5/2G DS N/A E1108ACBG-8E-E 0813A90CC Elpida · · ·
1G Kingston KVR667D2N5/1G DS N/A SO1280420822 SOP D6408TR4C
GL25USL156304PECXA
Kingston · · ·
512MB Qimonda HYS64T64000EU-3S-B2 SS 5 HYB18T512B00B2F3SFSS28171 Qimonda · · ·
1G Qimonda HYS64T128020EU-3S-B2 DS 5 HYB18T512B00B2F3SFSS28171 Qimonda · · ·
1G Corsair VS1GB667D2 DS N/A MID095D62864M8CEC Corsair · · ·
1G Corsair XMS2-5400 DS 4 Heat-Sink Package Corsair · · ·
512MB Kingmax KLCC28F-A8KB5 SS N/A KKEA88B4LAUG-29DX Kingmax · · ·
1G Kingmax KLCD48F-A8KB5 DS N/A KKEA88B4LAUG-29DX Kingmax · · ·
512MB Apacer AU512E667C5KBGC SS 5 AM4B5708MIJS7E0627B Apacer · · ·
512MB Apacer AU512E667C5KBGC SS 5 AM4B5708GQJS7E06332F Apacer · · ·
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Chapter 1: Product introduction 1-13