[Boli]

I can't quote any numbers mainly because I don't know any offhand (that are suitable) but I don't want to be caught up in a full blown technical discussion about weight vs volume etc. And as such I will use none technical language - but only to demonstrate a point.

That said: I've allways been told that Copper is best at "drawing heat" from a heat source. It will "suck" heat into it better than ALU. But ALU "looses" heat from the same surface area much easier.

So in theory a "badly designed" copper waterblock will perform worse than a similar design of Aluminium, becasue the ALU will "transfer" more heat to the water, due to its properties. BUT if a Cu block is well designed then Coppers "heat sucking" properties work in coppers favour, as it will draw heat away from the core much faster... keep the core at a lower temperature.

At least that is my way of thinking it... I have prob. got it all wrong, but it keeps it nice and simple for my brain (it being 06:51 now)