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Change CPU thermal grease

It is not rare to see a CPU overheating due to poor heat dissipation caused by the thermal grease or dust accumulation (see test a CPU).

Thermal grease is used as a contact between the fan and the CPU. Sometime it is too thick, sometime it is too thin or too old to conduct heat to the fan. Replacing it can help you fix many problems without fees!

Make sure that you have thermal grease (I recommand the Arctic Silver brand) and to understand the following subjects :

Computer parts (soon)







  1. Open the computer case (generally by removing 2 screws behind the case).
  2. Unplug and remove the CPU fan (there is generally 4 screws to remove).
  3. Remove the radiator (many different mecanisms exist to make it stay in place, you must observe to understand the trick. Sometime it's levers that need to be released with a screwdriver, sometime it's just a few screws to remove or other simple things. )
  4. Gently wipe of old thermal grease with a Q-tips slightly moistened with alcohol.
  5. Add some thermal grease, just enough so it covers the whole surface of the CPU under the pression of the radiator without exageration to avoid harmful accumulation. In most cases, the size of a little pea is enough.
  6. Put back the radiator and the fan in place (well plugged into the motherboard).
  7. Boot the computer and test your CPU to make sure that it works well.