Asus KCMR-D12 - Manual (Page 34)

2-16 Chapter 2: Hardware information
2.3.3 Installing the CPU heatsink
The AMD Opteron™ 4100 series processors require a specially designed heatsink
to ensure optimum thermal condition and performance.
• Ensure to use qualified heatsink assembly only.
• Ensure that you have applied the thermal grease to the top of the CPU
before installing the heatsink.
Follow these steps to install the CPU heatsink.
1. Orient and place the heatsink on top of the installed CPU, ensuring that the
screw holes are matched with the heatsink standoffs.
2. Use a Phillips screwdriver to tighten the two heatsink screws.
Ensure that the heatsink is not skewed or tilted, otherwise the CPU will overheat.