The first step in the installation process of the CNPS11X Performa is to screw two metal clips to the base of the cooler. Figure 11 shows the clips to be used with Intel CPUs in place.
Figure 12 reveals the backplate used to install the cooler. You must install the nuts at the backplate in the holes matching the socket used by your CPU.
Locate the backplate at the solder side of the motherboard, put the cooler over the CPU, and hold it in place using four screws, as shown in Figure 13.
The last step is to install the fan, as you can see in Figure 14.