What VRM temp are you guys getting with your overclocked 7970 ?
You can check it with newest version of
HWiNFO64.
I got a little scared when i checked my temp, on a SAPPHIRE 7970 with aftermarked
Accelero Xtreme 7970 heatsink+ fan on auto.
Good thing Accelero @ 100% fan sounds like stock cooling @ 30%, so i made a very agressiv fan profile with temp over 50 degree celsius = 100% fan.
(screenshots was just a test, from before i found my 24/7 clocks. 1200/1750 + fan at auto @ 1.175v + 1.625v)
*edit*
I dont know how to make the screenshots any bigger.

So i uploaded them here also:
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