i just bought one and on the cpu cooler i can see some gray stuff but not on the whole cpu cooler just in the middle part of it and it is in 3 parts. I bought thermal grease but im not sure to apply it or not, i don't want to put it on if its already their. Thanks!
In order to clean a cooler/cpu of previous thermal compound you need to use a high level of isopropyl alcohol fluid. I use 91%, the higher the better. Be sure to damped a lint free cloth with the alcohol, I use quality coffee filters, and clean off both surfaces. Make sure that are 100% clean. The amount of thermal compound you want to apply varies on the CPU, you probably only need a tiny dab in the center about the size of half of an uncooked grain of rice. I use artic silver 5, I have tried several other brands and I feel over all this one is the best. The higher the silver content the better. Why silver? Do some research on thermal conductivity. I am worried you might mess this up concerning you are asking this question. If you aren't certain about doing this, I would seek in person help.
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