when lapping the flater the better. If you had two perfectly flat surfaces you could put them together with no thermal paste and have the best possible thermal transfer but as we dont really have the technology to lap metal to fit together perfectly nor do we have perfect metal TIM's are good and shiney is good too! Although you probably wont notice a temp difference between a smooth piece of metal and a smooth shiney piece of metal.
just my $.02
__________________
Air cooled my ass.
|