To get to essence of this thread, could the very best desing in Al be transfered to Copper and get the same best performance, NO never, the differneces in thermal properties are just to big and the block would act differently, even optimal thickenss for those two block is different, so I don't think prototyping in AL help you in Cu. The only thing that help is machine testing your cnc program if you need to but I would use wood here.
And I can understand you two, but shoot me I'm a performanse freak and I know that those few degrees will get me higer and faster. Just one info Fixxit or Jaydee, have you two ever run athlon xp close to 2GHz at 2.16V on Aluminium block, NO WAY in the world could that be done, if I wouldn't have good designed copper block, and running at those speed stable at 37°C socket thermistor, 48°C in die diode full load, and those temps. are making me calm, no way I could be confortable running close to those speed with aluminium 24/7, 10 or more degrees higher.
And that my 0,02$
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