1. Preparing the motherboard
Set your motherboard to run at the correct core voltage, bus frequency and clock multiplier settings by consulting the manual. In some cases, you may need to do this through the DIP switches on the motherboard or the Frequency/Voltage settings in the BIOS.

2. Preparing the processor
Next, apply thermal paste on your processor by using a thin plastic visiting card, a plastic card is best suited to spreading the paste smoothly all across the surface of the processor core. You can also extend this paste around the core, but smoothen out the paste such that there are no air bubbles. Also, the paste should be in contact with every portion of the processor core.

3. Preparing the heatsink
Next, locate the region on the underside of the heatsink where the processor is going to touch the processor core. This is usually in the centre of the flat area of the heatsink. Once you have ascertained this zone, wipe it clean of any dust. Then evenly spread some thermal paste, carefully avoiding any air bubbles.

4. Seat the processor in the socket
Now, clamp the processor firmly into the socket on the motherboard and that it is correctly aligned with the pins. Do so without forcing the processor.

5. Install the heatsink
Place the heatsink on the processor gently, but firmly take care not to damage the core of the processor while doing this. Make sure that the heatsink is seated such that it is in complete contact with the processor core. After it has been positioned, fasten the clasps into the retentions hooks of the processor socket to ensure that it is in firm contact with the processor.

6. Connect the CPU fan
Finally, connect the CPU fan on the correct point on the motherboard. Make sure that the heatsink assembly is firmly seated there should be no play in it.