QDI P4I865G User Manual page 7

Caution
Be sure to unplug the AC power supply before adding or removing
expansion cards or other system peripherals, especially the memory
devices, otherwise your mainboard or the system memory might be
seriously damaged.
Caution
Be sure to add some Silicone Grease between the CPU and the heatsink
to keep them fully contacted to meet the heat sink requirement.
Caution
We cannot guarantee your system running properly under overclocking.
It depends on the overclocking ability of your peripherals.