The chaps over at AnandTech take a look performance in Rainbow Six: Vegas with mainstream/mid-range and low-end graphics cards from ATI and NVIDIA. The NVIDIA cards they tested Vegas with are the 7300 GT, 7600 GS, 7600 GT, 7900 GS, 7950 GT, 7900 GTX, and the 8800 GTS and GTX. From ATI, they have the X1300 XT, X1650 Pro, X1650 XT, X1900 XT 256, and X1950 XTX. Here's a taster:

Our performance tests show that in order to play this game smoothly with the resolution and quality settings at their highest, you will need at least an NVIDIA 8800 GTS (or possibly an overclocked X1950 XTX). The X1950 XTX and 7900 GTX at reference speeds can run the game at these settings without too much trouble, but they still see some choppiness when in a large firefight with a lot of stuff going on. Fortunately, the game still looks and plays well with the resolution and quality settings turned down, so don't despair if you aren't an owner of an 8800 yet and want to get a hold of this game. We still don't recommend playing Rainbow Six: Vegas on a low end card like the 7300 GT, because even at the lowest resolution and settings you will still probably run into choppy gameplay at certain points in the game, and the action can be fast-paced enough that this is a real problem. At this point in time, to really enjoy this game at a decent resolution you will probably want to go with at least a 7600 GT from NVIDIA or better yet an X1650 XT from ATI if you can get your hands on one. GeForce 7900 GS and Radeon X1900 GT are also good options.

Hopefully we will see some improvements in performance for Vegas on NVIDIA's hardware soon, because as it stands, the game clearly favors ATI parts, with the obvious exception of the 8800. That is a trend we've seen more of over time, however: G70 series hardware does very well at DX8 graphics, but when more DX9 effects are enabled the pixel shaders on many NVIDIA chips don't seem to do as well as ATI's hardware. We might have liked to see the kind of control over graphics quality in Vegas that we've seen in games like The Elder Scrolls IV: Oblivion, especially considering that maximum detail settings result in performance that is often lower than what we saw with Oblivion. Still, kudos to Ubisoft on this nice addition to the Rainbow Six series, and we look forward to further enjoying this game, as well as seeing what else comes along using the Unreal Engine 3 in the near future.