Continued on the next page) – Asus M4A78 PLUS User Manual
Page 23
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:
-
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 Qualified 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
·
·
·
(continued on the next page)
Chapter 1: Product introduction
1-13