Originally Posted by slaWter
According to the ComputerBase overall performance charts, both the 6990 and 590 are pretty equal.
Both aren't perfect though.
I think those cards are great engineering show-offs but normal SLI/CF setups are the smarter solution for customers.
4-way setups are IMO the only reason anyone should use those cards but profiles and scaling are usually very tricky with those configurations. I'd try it if there will be a 6GB version
I really like that ComputerBase site- they do very thorough investigations. Had some nice work on microstutter a few years ago.