darkphox :
Nobody worries about noise when it's an engine in a souped up hot rod, regardless if they take it on a Sunday drive now and then. These are the computer equivalent. 6990 wins, and Nvidia fans complain about fan noise. If this were a mid-range card, valid argument. But this is a horsepower contest!
Computers aren't hot rods, and they're not jet airplanes. For most people, the quieter a computer is, the better. That is why so many people complained about the GTX480 last year. Even though it was across the board faster than a 5870, it was much louder.
In this case, even if it's a "horsepower race" it's not a clear cut horsepower race because the 590 wins some of the benchmarks:
http://www.xbitlabs.com/articles/video/display/geforce-gtx-590_11.html#sect0
It looks like neither of the two new dual-processor graphics cards can claim absolute superiority in games. The Radeon HD 6990 and the GeForce GTX 590 won the same number of my tests and delivered the same performance in the rest of them.
Or Bit-Tech:
http://www.bit-tech.net/hardware/graphics/2011/03/24/nvidia-geforce-gtx-590-3gb-review/10
In some games the lead over even AMD’s massive Radeon HD 6990 4GB was substantial and in others only marginal, but the GTX 590 3GB is the king of the graphics cards based on the performance we saw.
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=716&Itemid=72&limit=1&limitstart=18
My tally of these results have the GTX 590 ahead in five tests, equal in five, and trailing in five....most would agree that the GTX 590 is the better choice.
And then there's the feature set. People also buy cards like this because they want to see computer games that don't look like console games.
I've been using 3d Vision, and then 3d Vision Surround, for two years and four months. ATi's 3d solution is like a high school science project with no computer monitors, and a 24fps limit at 1080p.
Likewise, I have a dozen games that use PhysX, and while that isn;t a deal maker/breaker for me, the games do look more realistic with the PhysX on. (not to mention ATi must agree as they've been trying to get together GPU accelerated physics (and failing) for five years now)
Basically all ATi gives a user is better performance at some games, and some settings, at the expense of a total lack of modern graphics features and hair dryer noise you have to put up with every minute you game.
BTW, as far as "high res" goes, I've benchmarked my 590 at 57X10 in Mafia2, Just Cause 2, and Far Cry 2 at over 70fps. The fact that I can turn on the PhysX enhanced water at Just Cause 2, the PhysX effect in Mafia 2, or play any of them in 3d doesn't exactly make me think "Jinkies! If I had a leaf blower 6990 I might play one of them at 80fps!".
The 6990 is just a primitive, loud card- a throwback to the early days of PC gaming when we didn't have any differentiating feautures and a "good HSF" was about a pound of aluminum with a 60mm fan spinning at 3000rpm and making your dog start beating his head against the wall.