Cu versus Alu,how much improvement? (in CPU temps that is)

Has anyone create an Alumnium version and Copper verison of their waterblocks, and compared the temps gotten by both materials?

aprox 5c,

the main problem will be dis-similar metals, get corosion if theres any other metals almost. so brass and copper is out of the question.

Jon

I think the absolute difference between the two can only be determined per waterblock, actually even per setup. If you have a very good setup and a well-designed waterblock, the difference between an alu and cu version could be larger than with a setup with less stellar components.
In any case, it's a pretty sizable factor AFAIK and going copper is well worth it.

Also to clarify- brass and copper can both be used in a wc loop, but either of those combined with alu will increase corrosion.