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There a million different pages around the Internet with conflicting information on how much thermal paste to apply and how to spread it. Some say a half-bean-sized drop in the middle, others say a circle or rectangle on the CPU. Some tell you to let the heatsink's base spread it, while others say to spread it with a knife or your finger with a plastic bag on it. Some coolers even come it with applied fully on the base, like Corsair H50 and all Arctic Cooling products.
What is the best way to apply and spread thermal paste, and how much of it?
1And you don't want to use too much either. That's equally important. – None – 2011-02-16T07:45:20.020
+1, almost exactly what I do, an old credit card or similar is perfect for making a flat layer that covers the die. – Sirex – 2011-02-16T08:30:46.290
On the other hand with a flat layer, you can get air bubbles between heatsink and processor. Some people fix this by putting a small blob of thermal paste on the middle of the flat layer, at the intersection of the diagonals, so that it comes in contact with the heatsink first and prevents bubble creation. Another option, if there is enough thermal paste available, it to try several methods of application and carefully remove the heatsink after. If there are undisturbed areas of paste, that's where the bubbles were. – AndrejaKo – 2011-02-16T10:47:22.490