1.6.2 Installing the heatsink and fan Asus prime Asus M3A78-EM

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2.  Attach one end of the retention bracket to the retention module base.

3.   Align the other end of the retention bracket (near the retention bracket lock) 

to the retention module base. A clicking sound denotes that the retention 

bracket is in place.

4.  Push down the retention bracket lock on the retention mechanism to secure 

the heatsink and fan to the module base.

Ensure that the fan and heatsink 

assembly perfectly fits the 

retention mechanism module 

base; otherwise, you cannot snap 

the retention bracket in place.