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Originally Posted by pHaestus
So Bill another question: I estimate my CPU (2200MHz 1.8Vmbm) as running at 71.3W from water temp rise. But if you use those numbers to calculate a C/W then I am far lower than your die sim. Is that secondary cooling or temp compression (lateral resistance to heat flow from the source to the diode) or what? Any way to get at that sort of thing?
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FWIW, that block has a C/W after three days on my unfinished diesim setup of 0.182C/W at 2.73lpm (bucket method). Watts from Fluxblock (109mm^2), delta T from thermistor 1.2mm from FB/WB junction. Gives ~0.152C/W at FB surface. Rough numbers but maybe something to work with. Might give you an idea of your "temp compression" C/W offset, if any, on the same block.
These are numbers I will use at any rate.