The chatter from the Nvidia apologists is simply unbelievable. The GTX590 is a dud, get over it, it happens.
Is 6970 a dud because it cant beat a 580? The multi-GPU market is a niche.
How many people could tell the difference between a 6990 and a 590 if they were sat in front of two different systems and had to guess which was using which?
The goal-posts were moved several times, it isn't surprising that people would find something to complain about.
First the 580 could never happen.
Then the x2 could never happen.
Then the x2 did happen, but it is a faliure because you shouldnt over-volt it.
The truth is, only a handful of people will own either card, but they are getting the most ink right now. This is because talking about 6790s and 560s isnt sexy, and we really are stuck until late fall/winter with this same card line-up.