So, I was able to get my HD 7950 stable @ 825mV mining away at 230H/s . Holy crap, according to GPU-Z (VDDC x VDDC Current) the GPU only power draw is around 55W. That’s crazy! I didn’t even know that was possible. I have 4 cards on this rig but this one is #2 on Claymore and #3 on Afterburner. Check out this ASIC quality though.
Moral of the story is undervolt your cards! Low temps, low power, it’s awesome. Good luck my friends and I’d be interested to see if anyone can get a card lower than 825mV.