Asus M4A78-EM User Manual - Page 24

Memory configurations - memory qvl

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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: I�n�s�ta�l�l�a��m�a�x�i�m�u��m��o�f�3�G��B��s�y�s�te�m��m��e�m��o�r�y�i�f �y�o�u�a��re��u�s�in��g�a��3�2�-�b�it�W��i�n�d�o�w��s® OS. - Use a 64-bit �W�i�nd�o�w��s® 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 Motherboard Qualified Vendors Lists (QVL) DDR2-1200(O.C.)MHz capability Size Vendor Part No. SS/DS CL Chip NO. 2048MB(Kit of 2) Kingston KHX96002K2/2G DS 2048MB(Kit of 2) OCZ OCZ2FX12002GK DS 2048MB(Kit of 2) Team TXDD1024M1300HC6 DS 5-5-5-15 5-5-5-18 6-6-6-18 Heat-Sink Package Heat-Sink Package Heat-Sink Package Chip Brand N/A N/A Heat-Sink Package DIMM socket support (Optional) A* B* C* · · · · · We recommend that you install the DDR2 1200 memory modules on the yellow slots for better performance. DDR2-1066MHz capability Size Vendor Part No. 4096MB(Kit of 2) A-Data 2048MB(kit of 2) Apacer 4096MB(kit of 2) Apacer 1024MB Corsair 2048MB(Kit of 2) Corsair 2048MB(Kit of 2) Corsair 1024MB Crucial 2048MB Crucial 2048MB(kit of 2) G.SKILL 1024MB G.SKILL 2048MB(Kit of 2) G.SKILL 4096MB(Kit of 2) G.SKILL AD21066E002GU 78.0AG9S.9K4 78.AAGAL.9KZ CM2X1024-8500C5 CM2X1024-8500C5D CM2X2048-8500C5D BL12864AA1065.8FE5 CT25664AA1067.16FE1 F2-8500CL5D-2GBPI F2-8500CL5S-1GBPK F2-8500CL5D-2GBPK F2-8500CL5D-4GBPI-B SS/DS CL Chip NO. DS 5-5-5-15 Heat-Sink Package DS 5-5-5-15 Heat-Sink Package DS 5-5-5-15 Heat-Sink Package DS N/A Heat-Sink Package DS 5-5-5-15 Heat-Sink Package DS 5-5-5-15 Heat-Sink Package SS N/A Heat-Sink Package DS 7-7-7-13 9DJKH D9JKH SS 5-5-5-15 Heat-Sink Package DS 5-5-5-15 Heat-Sink PackageSN:815130037562 DS 5-5-5-15 Heat-Sink Package DS 5-5-5-15 Heat-Sink Package DIMM socket Chip Brand support (Optional) A* B* C* N/A ··· N/A · · N/A ··· Corsair ·· N/A ··· N/A ··· N/A · · Micron · N/A · N/A ··· N/A ··· N/A · (continued on the next page) 1-12 Chapter 1: Product introduction

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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:
-
Install a maximum of 3GB system memory if you are using a 32-bit Windows
Install a maximum of 3GB system memory if you are using a 32-bit Windows
®
OS.
-
Use a 64-bit Windows
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 Motherboard Qualified Vendors Lists (QVL)
DDR2-1200(O.C.)MHz 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
(continued on the next page)
We recommend that you install the DDR2 1200 memory modules on the yellow slots for
better performance.
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
·
Chapter 1: Product introduction
1-12