The computer case includes motherboard spacers and screws. This helps set the motherboard in the case. Mount the spacers into the corners and to the proper side holes. It should match up with the holes in your motherboard.
If the motherboard has different jack arrangements from the case’s I/O (input/output) shield, use the shield that comes with the motherboard. Mount it from the inside of the case.
Now, to install the processor, raise the lever on the side of the CPU (processor) socket. The CPU’s pins are made in a way that it is possible to put the CPU into the socket only one way. Therefore, if you are doing it right, it should easily fit.
Hold the processor down and close to the lever. Before installing the CPU cooler, put thermal compound onto the top of the CPU (on core).