This may seem like a dumb question that doesn't matter, but what thermal compound for your CPU to heat sink is the best? Last computer i built was 5 years ago when arctic silver 5 was all the rage. Is there anything new out that is better?
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It doesn't really matter. There won't be more than 3C difference between the best and worst compounds, and most fall within two degrees of each other. AS5 is fine if you still have some. If you don't, I think MX-4 is slightly better.