Some people in this thread have said that faster cards are "just for Crysis", but I'm wondering do any of you play Stalker Shadow of Chernobyl?
I play it on a 1950Pro at 1280x800 with static lighting and scaling to 1920x1200 for my monitor, which gets me about 55fps. If I run it at 1920x1200 with dynamic lighting I get about 16 to 25fps depending on which flavour of "max" settings I use (there's basic and advanced). If I turn on indirect lighting, which is a console option not in the menus, it drops to 8fps in complex areas (and looks wonderful). So I thought about buying one of the cheap 8800GTXs that are around ATM.
Now I look at 8800GTX reviews using Stalker and they get 40 to 70fps depending on their settings, going from basic high to the basic maximum to advanced maximum. Nobody tests with indirect lighting. None of them are using the nvidia driver hack which allows true x4AA on the GPU. [Stalker uses a deferred renderer which won't work with multisample AA in DX9, because DX9 doesn't expose the functionality, but it can work with a hack that gets around the API.]
So there is a game which could absolutely use some more graphics power -- if the GT200 is twice as fast as the 8800GTX then maybe it can turn on MSAA and VSync. Two of them in SLi might get close to 60fps at 1920x1200 with MSAA and indirect lighting. And it's got a sequel coming, which is supposed to have the same performance but I've heard that one before.
Then today I played the Armed Assault demo, which ran at half the speed of Stalker...
8800GTX absoloutely murders the 1950Pro though