Central Processing Unit (CPU) Asus prime Asus M3A78-EH

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Chapter 1: Product introduction


Central Processing Unit (CPU)

The motherboard comes with an AM2+/AM2 socket designed for AMD® Socket 

AM2+ Phenom™ FX / Phenom / Athlon™ 64 / Sempron™ processor or for Socket 

AM2 Athlon 64 X2 / Athlon 64 FX / Athlon 64 / Sempron processor.

The AM2+/AM2 socket has a different pinout from the 940-pin socket designed 

for the AMD Opteron processor. Ensure you use a CPU designed for the 

AM2+/AM2 socket. The CPU fits in only one correct orientation. DO NOT force 

the CPU into the socket to prevent bending the connectors on the socket and 

damaging the CPU!


Installing the CPU

To install a CPU.

1.  Locate the CPU socket on the motherboard.

2.  Unlock the socket by pressing the 

lever sideways, then lift it up to a 

90°-100° angle.

Ensure that the socket  lever is lifted up to 90°-100° angle, otherwise the CPU 

does not fit in completely.

Socket lever



M3A78-EH CPU Socket AM2