Clean old thermal grease from the CPU.
Spread new thermal grease evenly on the CPU.
In sequence, turn the 4 clips clockwise to the end.
Place the cooler and aim the 4 clips at the holes of the motherboard.
Hold the cooler and push down the 4 clips one by one.
Connect the fan connector to the motherboard, complete.
In sequence, turn the clips counterclockwise to the end.
Hold the cooler and pull the 4 clips one by one.
Now, it’s OK to demount the cooler.