And to think, I have one of those personal desk fans continually blowing cool air through my PC just to keep the heat down. No, I'm not going to do anything to produce more heat, wear & tear than necessary. Silicone is very flexible as far as temps goes, but get it too hot, it will sizzle & possibly catch fire.

Too much heat also causes more issues, such as solder melting, which will lead to component failure. It's just not worth the risks to get an extra half of a GHz out of the CPU.