1.7.2 Memory configurations Asus prime Asus M3A78-EM

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ASUS M3A78-EM

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•  When using only one memory module, start installing the DDR2 DIMM from 

slot DIMM_A1 or DIMM_B1 for better overclocking capability. 

•  For dual-channel configuration (2), you may: 
 

-  install identical DIMMs in all four sockets OR  

-  install identical DIMM pair in DIMM_A1 and DIMM_B1 (yellow sockets) 

 

and another identical DIMM pair in DIMM_A2 and DIMM_B2 (black   

 

sockets)

•  Always use identical DDR2 DIMM pairs for dual channel mode. For 

optimum compatibility, we recommend that you obtain memory modules 

from the same vendor. 

Important.notice.on.installing.Windows

®

.Vista./.XP.32-bit.version.

•   If you are using a Windows 32-bit version operating system (e.g. 32-bit 

Windows XP, 32-bit Vista) without the Physical Address Extension (PAE) 

support, the system will allocate a certain amount of memory space for 

system devices. 

•   We recommend that you install only a maximum of 3GB system memory 

when using a Windows 32-bit version operating system without the PAE. 

The excess over 3GB of installed memory will not cause any problem; 

however, the system can not use this excess memory space and the 

system will display less than the total size of physical memory installed.

64-bit

Windows

®

 XP Professional x64 Edition

Windows

®

 Vista x64 Edition

The motherboard can support 8 GB physical memory on the operating system 

listed below. You may install a maximum of 2 GB DIMMs on each slot.