S.T.A.L.K.E.R.: Shadow of Chernobyl
The average performance of all GeForce 8800 GTX models hardly depends on the resolution, at least until we get to 2560x1600. Minimal performance also doesn’t vary much, the delta lies within 32-34fps, therefore, you can choose any resolution you want if the monitor matrix supports it.
From the previous generation solutions only GeForce 7950 GX2 looks competitive enough if we disregard worse quality of anisotropic filtering. At least in 1600x1200 it yields just a little bit to GeForce 8800 GTX and runs almost as fast as GeForce 8800 GTS. And the minimal performance of Nvidia’s former flagship solution doesn’t drop below 25fps.
Unfortunately, we can’t say the same about AMD Radeon X1950 XTX that cannot get beyond 40fps in 1600x1200, and its minimal performance of less than 25fps cannot ensure comfortable gameplay. Looks like the AMD solution featuring only 16 TMUs simply lacks fillrate speed, because S.T.A.L.K.E.R boasts a lot of wide open spaces with rich vegetation, a lot of buildings, anomalies, etc.
The GeForce 8800 GTX suffers an almost twofold performance hit when switching from 1920x1200 to 2560x1600 resolution. The minimum speed is not below a critical level, yet we wouldn’t recommend you to play the game in this mode. You should either use two such cards in a SLI subsystem or disable FSAA.
The XFX GeForce 8800 GTX XXX Edition adds up a 10% bonus to the average frame rate, yet it cannot reach even 45fps at 2560x1600 with enabled 4x FSAA. At a resolution of 1920x1200 pixels the GeForce 8800 GTX can run the game normally even without the 10% speed bonus the XFX card provides. So, any version of GeForce 8800 GTX suits equally well for playing this game.
Having much more modest technical characteristics, the GeForce 8800 GTS is far slower than the senior model of the series. Anyway, you can play the game in 1600x1200 on a GeForce 8800 GTS.
As for the last-generation graphics cards, the Radeon X1950 XTX can run Supreme Commander at an acceptable speed in 1600x1200 with enabled 4x FSAA. You’ll have to limit yourself to 1280x1024 if you’ve got a GeForce 7950 GX2.