Asus P7F-M - Manual (Page 32)

2-14 Chapter 2: Hardware information
2.3.4 Installing the CPU heatsink in rack
The Intel ® 1156 processors require a specially designed heatsink to ensure
optimum thermal condition and performance.
• Ensure that you use qualified heatsink assembly only.
• Ensure that you have applied the thermal interface material to the top of the
CPU before installing the heatsink.
1. Peel off the sticker on the heatsink metal plate and affix the plate to the back
of the motherboard, matching the standoffs to the heatsink screw holes.
2. Use a Phillips screwdriver to tighten the four heatsink screws in a diagonal
sequence.
Ensure that the heatsink is not skewed or tilted, otherwise the CPU will overheat.