Asus RS160-E4/PA4 - Manual (Page 24)

Chapter 2: Hardware setup 2-8
2. Carefully lower the airduct until it
fits in place.
To install the airduct:
1. Position the airduct on top of the
heatsink.
2. Twist each of the four screws with
a Philips (cross) screwdriver just
enough to attach the heatsink to
the motherboard. When the four
screws are attached, tighten them
one by one to completely secure
the heatsink.
2.2.2. Installing.the.CPU.heatsink.and.airduct
To install the CPU heatsink:
1. Carefully place the heatsink on
top of the installed CPU.