There's something else we are overlooking.

I deleted cgminer bin files (to start over) and the hashrates on both cards went down (to 500-ish). I had to play with my bat files settings to bring the rates back up - couldn't bring them to the same levels even by restoring the bin files and restoring the previous hardware configuration. It used to be 730/620 now it's 665/625 and my bat file is completely different now after a lot of work.

With the risers the temps are in the 70s.

Go figure...