It looks like switching over to the F43 BIOS really helped! I'm running both cards at 1100/1420, +20 power limit, and temps are holding steady at 83 and 68 C respectively, with the fans running at 75%. Both cards are now hashing at about 515 Mh/s. SWEET.

One thing I was curious about: in Afterburner, my core clock slider now maxes out at 1100 instead of 1200 like before. Is there any way to get my clock running above 1100 on this BIOS firmware? I'd love to be hashing even faster if I could.

I've got 2 Gigabyte 7950s in a Windows 8 rig housed in a Corsair 500R case with 2 front panel fans and a back panel fan. I'm running the cards at stock speeds with the sides of the case off and am seeing one of my cards run at 83 C and the other at 68 C. The GPU fans are running at 100% nonstop, and I'm only getting ~470Mh/s out of each card. I'm brand new to all this - will moving to the older firmware bring temps down and Mhashes up? Or should I put the hotter one out on a riser cable? Stick a box fan in front of the rig? Send the hot card in for replacement?

Any advice is appreciated.