Asus KFN4-DRE - Manual (Page 30)

2-10 Chapter 2: Hardware information
2.3.2 Installing the heatsink
The AMD Opteron™ 2000 series processors require a specially designed
heatsink to ensure optimum thermal condition and performance.
Follow these steps to install the CPU heatsink.
1. Place the heatsink on top of the
installed CPU, making sure that
the screw holes are matched
with the heatsink standoffs.
Make sure that you use only qualified heatsink assembly.
2. Secure the heatsink with two
screws.
Make sure that the heatsink
is not skewed or tilted
otherwise, the CPU will
overheat.
3. If you installed a second
processor, repeat steps 1-2 to
install the second heatsink.