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Originally Posted by stuartbe
If you are just going to replace the compound :-
Get some cotton wool buds and isoprpile alcahol (you can get these from maplin) take off the chip and the cooler carefully and make sure you wear an antistatic wrist strap. Using the IPA clean of the compound from both the cooler and from the die in the centre of the cpu. Dont forget to clean the edges of the die. Place a small blob of compound (about a pin head) of compound on the centre of the raised die on the chip. Then replace the cooler.
Do not put too much compound on. To much compound can be worse than none at all.
There are lots of good compounds around. I like arctic silver myself.
HTH
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You need more than pin head size! The point of heatsink compound is to even out the imperfections in the machining of the heatsink/CPU die, generally a pea sized amount does the trick.
(as for antistatic straps, it's doubtful that most people own them, so earthing yourself on the case chassis is just as effective, i.e. hold it with your spare hand)