Originally Posted by nleksan
I am one of the people fortunate enough to have owned both the 7970 and 680 Lightning, in fact two of each.
My friend and neighbor has also owned two of each, so I am drawing from four samples of each overall, both air and water cooled.
First, I have to say that a 1350/7000 clock speed for the 7970 without full voltage control AND at least water cooling, congratulations you have literally a one in probably 10,000 card.
Here are the clocks I've been able to reach, benchable, for the four 7970s, don't recall the voltage but it was a fair amount beyond what a non Lightning will hit:
Heres the 680s, with full voltage control and AC AquagraFX blocks:
The only thing that the 7970s consisntly scored better in is Heaven, and that's due to the tessellation tweaks. Running with tessellation un-modified, the 680s were all ahead.
In actual gameplay, though, there's no competition: 680s are so much smoother that the 7970s felt like they ran a few dozen fps slower. Oh, and the microstuttering was so bad that I couldn't play for more than an hour without a headache, not the case with the 680s.
Having played with a few voltage controllable 780s, I would bet just about anything that there is not a single 7970 that, even with chilled water, will outperform a 780.
Everyone who says "an OC'd 7970 will beat a 780" forgets that the 780s clock well, also.
I support AMD doingwell bbecause without competition, we'd end up with an AMD/Intel situation where the difference between the two is so great that everyone loses because of such price disparity.