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TH3L4UGH1NGM4N, on 13 May 2012 - 01:13 AM, said:
Is it me or does the older Fermi gtx 58O still beat out a current gen 797O.
On Star Craft 2 Roundabout War---Yes

The bechmarks were run in windows using bootcamp, so are not a reflection of how any of the cards referenced perform in OSX, but 7970 did beat out the 580 in the other 2 benches ran and was only edged out by 580 on the starcraft bench, could be particular code is better optimized for Nvidia vs AMD and/or early version of AMD drivers may still have some qwerks, or.....other Windowzy/Star-Crafty stuff.
From same article, <Luxmark 2.0 "Room" gpu only: HD 7970=1003 samples/sec; GTX 580=649 samples/sec>, <Wow Narache Run 25x14 High (FPS): HD 7970=201; GTX 580=178>
Conclusion: If you primarily use your MacPro (or similar) to run Windows in Bootcamp and render scenes of rooms all day long, the HD 7970 is definitely the card you'll want. For me, I'll need to see the HD 7970 benched in OSX with full HW acceleration before deciding what I think about it. GTX 680 should beat it in all the above, but at a bit higher cost, and you gotta find one first. If performance and price both put it between the 580 and 680, no reason not to be happy with any of them.