AMD Calls Out NVIDIA on "Fastest Graphics Card" Claim

AMD says they want NVIDIA to put their money where their mouth is and prove that the NVIDIA GTX 590 really is the world's fastest graphics card. Of course AMD believes their recently released Radeon HD 6990 is the world's fastest graphics card. I hope this throw down involves sharks or something else bitey. [AMD blog, via Ironhammers thanks Bobby]