BigTnaples
Todd Howard's Secret GAF Account
Considering you can OC a 970 to stock 980 performance it should do a lot better than 30-40 FPS.
If you can OC that high. I've never had luck over locking GPU's or CPU's. Dunno why, I just always end up reverting to stock speeds for stability.
Would love to get a decent OC on my already Oced 970 FTW. But the effort it takes to get it right (considering I never have) makes me want to steer clear..