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Originally Posted by ricecrispi
I'm with Cathar on JoeC recent change in test setups. They stayed pretty much the same for how many years?
Well having a die size too large is not good for JoeC because reading the link supplied by bobkoure
Exploration of the Theoretical Limit of Thermosyphon Cooling System
A huge determining factor was area (cross section) of the boiling area interfacing to the heat source. Larger the area, better results. Explains why he got such a bad C/W for small die sim and a low C/W for large die sim.
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So it boils down to surface area, pardon the pun.
