Good review, however you shouldn't continuously pick on the 6990 for that fan. Had AMD toned it down, and I'm sure that they thought about it long and hard, it would've resulted in a much warmer case. The length of the 6990 is hard to swallow, and I can't understand why they didn't use a more innovative cooling solution, but I get the feeling that it's being lumped in the same bracket as the GeForce FX 5900. What a horrible place to be. I'm waiting to see if a 3rd party brings out a new 6990 design which would sort out the fan issues.
I don't see the point running games on either of these cards without AA, and at any resolution lower than 2560. Seems like a waste.
NVIDIA have done a good job here but we kind of knew it would be hungrier and hotter than the 6990. Anandtech pointed out that the OCP is extremely aggressive and may in fact hamper the card when overclocking, which is something to bear in mind.
By the way, I don't think it's wise to throw fanboy accusations in a review. Firstly, the 590 may be quieter than the 6990 by a country mile, but when you overclock it, that fan does get a far bit louder (though still not to 6990 levels, it has to be said). Secondly, the water block fiasco; why do you have to be a fanboy to mention it? It's entirely possible that a good quarter or third of the readership will be considering exotic cooling for exotic cards, and some of those people buying such cards may have already researched it.