Installing the heatsink and fan Asus prime Asus M3A78-EH

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Chapter 1: Product introduction


Installing the heatsink and fan

The AMD Phenom™ FX / Phenom / Athlon™ 64 / Sempron™ / Athlon 64X2 / 

Athlon 64 FX processor requires a specially designed heatsink and fan assembly 

to ensure optimum thermal condition and performance.

Follow these steps to install the CPU heatsink and fan.

1.  Place the heatsink on top of the installed CPU, making sure that the heatsink 

fits properly on the retention module base.

Retention Module Base

CPU Heatsink


Retention bracket lock

Retention bracket

Ensure that you use only qualified heatsink and fan assembly.

•  The retention module base is already installed on the motherboard  

upon purchase.  

•  You do not have to remove the retention module base when   

installing the CPU or installing other motherboard components.

•  If you purchased a separate CPU heatsink and fan assembly, make  



sure that a Thermal Interface Material is properly applied to the CPU    


heatsink or CPU before you install the heatsink and fan assembly.

Your boxed CPU heatsink and fan assembly should come with installation 

instructions for the CPU, heatsink, and the retention mechanism. If the 

instructions in this section do not match the CPU documentation, follow the