Meet the ATI Radeon HD 5970. Why are we bothering to introduce you? Because the ATI Radeon HD 5970 is now the world's fastest graphics card, that's why.
Course, it had want to. It's got two GPU's on the one card, and will cost you around $600.
I always knew the day would come where my 8800GT felt truly inadequate. I believe that day is today.