AMD Radeon HD 6990 vs. Nvidia GeForce GTX 590
 

It looks like neither of the two new dual-processor graphics cards can claim absolute superiority in games. The Radeon HD 6990 and the GeForce GTX 590 won the same number of my tests and delivered the same performance in the rest of them. We have this equilibrium for two simple but important reasons.

http://www.xbitlabs.com/articles/vid...e-gtx-590.html