[luau] Underclocking / Aluminum cases

[Ray Strode]

> My feeling is that copper would tend to hold the heat, for example  a 
> copper clad bottom on a pot or skillet.  I'm pretty certain that 
> aluminum cooling fins are the most efficient, although aluminum car 
> radiators aren't very good while car radiators with copper fins are 
> common  and easy to repair. 

Actually, I read somewhere (my physics book? not sure) that copper, 
aluminum, silver, and gold were all good conductors of heat, but the 
order of best to worst
is: silver, copper, gold, aluminum.  

The idea is, if it's a better conductor of heat, then when it's used as 
a heat sink, the heat will away from the chip to it. where it can be 
cooled by the air (That's why
heat sinks are in fins i think).

Anyway, i'm certainly no expert, and could probably be wrong.  Maybe one 
of the other people on the list that are, could verify what i'm saying.

--Ray