GTS without question. Here are the most recent reviews with newest drivers from both camps.
Especially when AA and AF are turned up.
http://www.thetechlounge.com/article...8800GTS+768MB/
http://enthusiast.hardocp.com/articl...50aHVzaWFzdA==
The preponderance of evidence clearly shows the 2900 XT is generally inferior even in Direct 10 testing.
from Extremetech:
Then there's ATI. No matter the reason (deliberate snub or developer relations snafu), their card runs the DX10 version of Lost Planet like a steaming pile of integrated graphics. It's not just the terrible performance; it's the rendering flaws that make it unplayable. Have we stumbled upon a worrying side-effect of ATI's new superscalar architecture? We know the 320 stream processors can deliver massive peak floating-point computational power, but we also know they're arranged in 64 blocks of 5 scalar processors. If you can't deliver 5 operations to each block, you're throwing away processing power. Is this another architecture, like the GeForce FX of old, that will need serious driver optimization to get good performance out of every new game that hits the market? That would be a complete reversal from the days of the Radeon 9000 cards, which famously ran most games very well even if they were not very well optimized
http://www.bit-tech.net/hardware/200..._hd_2900_xt/22
The other thing that needs to be mentioned is that R600’s current anisotropic filtering quality isn’t up to the standards we’ve come to expect from ATI hardware. Hopefully the problems are just related to the current driver release, but even if that is fixed, it will not be up to the quality standards delivered by Nvidia’s G80 graphics chip. That makes Nvidia’s angle-independent anisotropic filtering hardware all the more impressive.
At the moment, the GeForce 8800 GTS 640MB is the better buy and those that bought one shouldn’t be disappointed.
And just for fun I included
Here is the very latest test showing a single 8800 GTX Ultra out performing
2900 XT Crossfire at high resolutions and just destroying a single 2900 by more than 100% in OBLIVION!!!
http://www.bit-tech.net/hardware/200...ltra_650m_xt/5