DailyTech - ATI Radeon HD 2900 XT Performance Benchmarks
Note: Keep in mind this is the XT, not the flagship XTX model. These are very impressive especially from something that is to compare with 8800GTS. The oblivion benchmarks stand out the most.
It uses 320 stream processors @ 740 MHz (740 is what most people are reporting, although I don't know if it will be final) , the GTS only has 96 but it's @ 1.35GHz, so Nvidia will have faster stream processors but ATI will have more of them. This is why the XT's 320 doesn't blow the GTS 96 out of the water. But even still, I can't wait to see what the XTX brings to table. Not to mention the word is AMD is going to price them very competitively which is great for us consumers.
I'll be picking up a new video card sometime in July, my 7600GT can hold me over till then. I have a feeling the long wait for the R600 is going to be worth it.