Running two 7970s on one rig (same driver). One is a ghz edition which i've undervolted to 1.125v (it's stable didn't try to go lower) from ~1.215v. The other is a reference at default clocks/voltage. I'm surprised how much cooler it runs even though its voltage is quite a bit higher. Does 75mhz make that much difference? Thinking about undervolting the reference card too.

Edit: maybe i should redo thermal paste
7970 compare.JPG