hey sparx. sorry to hear about the issues you're having. one question, what is your PSU? those 7970s eat a lot of juice under load, 2 of them with an 870 run right around 1Kw at stock clocks, if my google-fu can be trusted. if anything is OC'd.....
sorry if you already gave this info and i missed it.
Hahahaha nice joke! I7 3930k OC'ed to 4ghz. 7970CF @1.3V 1265Mhz = max 770W!
Normal is 550W. And GPU undervolted to 0.95V is 440W! Running Unigine Heaven Benchmark!
But i have the Same Problem as you! After 1h-2h Gaming i get a Freeze. Tried in Bloodline Champions and Kingdoms of Amalur. Skyrim works fine!