All modern PC CPUs produce enough heat that they need a heat sink. Almost all of them need a heat sink with a fan. Many heat sinks come with some sort of thermal transfer paste pre-applied - typically a patch of grease; thermal paste; goop or whatever you want to call it.
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*Review: Overclock3D (
http://www.overclock3d.net/reviews.p...rmal_paste/1)*
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