Asus M4A78 PLUS User Manual - Page 23

Memory configurations - support

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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 2G Kingston KVR667D2N5/2G DS 512MB Kingston KVR667D2N5/512 SS 2G Kingston KVR667D2N5/2G DS 1G Kingston KVR667D2N5/1G DS 512MB 1G 1G 1G 512MB 1G 512MB 512MB Qimonda Qimonda Corsair Corsair Kingmax Kingmax Apacer Apacer HYS64T64000EU-3S-B2 SS HYS64T128020EU-3S-B2 DS VS1GB667D2 DS XMS2-5400 DS KLCC28F-A8KB5 SS KLCD48F-A8KB5 DS AU512E667C5KBGC SS AU512E667C5KBGC SS CL Chip No. Chip Brand N/A 7RE22 D9HNL Micron N/A SO1237650821 SBP D6408TR4C Kingston GL25USL074905PECNB N/A E1108ACBG-8E-E 0813A90CC Elpida N/A SO1280420822 SOP D6408TR4C Kingston GL25USL156304PECXA 5 HYB18T512B00B2F3SFSS28171 Qimonda 5 HYB18T512B00B2F3SFSS28171 Qimonda N/A MID095D62864M8CEC Corsair 4 Heat-Sink Package Corsair N/A KKEA88B4LAUG-29DX Kingmax N/A KKEA88B4LAUG-29DX Kingmax 5 AM4B5708MIJS7E0627B Apacer 5 AM4B5708GQJS7E06332F Apacer DIMM support A* B* C* · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · (continued on the next page) Chapter 1: Product introduction 1-13

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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