Ugh, again with the rose tinted glasses. The GTX295 didn't dominate the 4870X2 because it used better power hardware and whatnot, it dominated the 4870X2 because ATI created the 4870X2 in order to make their slower, cheaper cores more effective at high resolutions. The GT200 was far faster than the RV770 - so of course by putting two on a board you're still going to have a faster board. It wasn't faster because of the quality of the power hardware.
The rev1 GTX295 had extremely slim profits for nVidia - that's why they spent money making a rev2 (which had the same performance).
Back on topic - this card will sell well unless it starts failing. nVidia might have underestimated their OCP - and sure if the card can't handle overclocking it's a bad thing, which for me at least would tip the scales towards the 6990, but if you overclock you void your warranty and bear the obvious risks of overclocking anyway.
I'm sure there'll be some third party boards out soon if their is a big problem - or even a whole new design from nVidia.
Good point. I forgot about the earlier ones.
True the 295 dominated because a 275 > 4870.
Now we have the same scenario, a 580 > 6970
But in this case 1 x 6990 > 1 x 590.
What happened, cheaper components.
I'll say it again the 590 is a step down to what NV did with the previous gen of their dual gpu card.
The rev1 295 did have superior components, they could overvolt and overclock 30% and greater.
And once again I'm not making any hw comparisons to the ATI side, just to what NV did with this gen dual card compared to the last gen.