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Originally Posted by Varsis
Cathar, got a little thermal probe shoved right up next to the core with a bunch of goop
. seems to be pretty acurate with in .1c
1.8vcore.
runs 48c full load full fans with 1.85v
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Sorry, that's about the worst way to measure CPU temps. Completely non-repeatable with remounts as removing the CPU to clean it results in minor variations in contact. It's very much subject to air-flow patterns, what's going on inside the waterblock above the probe, and the edge of the core is perhaps the coolest bit to measure.
Find out what your water temps are. I suspect that they may be a lot higher than is desirable, especially if from 7V to 12V is yielding a 3C drop in water temps.
Really need to focus on the temp deltas though: CPU die temp minus water temp, and water temp minus radiator intake temp. That's about the only real way to figure out what's going with the block, as opposed to what's going on with the radiator.