Too early to call it a victory. But i downloaded afterburner, set the fans up at 100% and played crysis 2 for about 30-35 minutes. 3840 X 1024 averaging around 60 fps, had one slowdown to around 6 fps for maybe 2 seconds. I had Hwmonitor running in the background, one card reached 89, the other 74.
Hopefully this solves the problem
Kevin