While Half-Life 2 game is pretty demanding in a lot of cases, modern high-end graphics cards are so fast that even in 1600x1200 resolution performance is bounded by that of the central processing unit.
With the FSAA and anisotropic filtering turned on, the GeForce 6800 Ultra lags behind all the other boards, while the GeForce 7800 GT is as fast as two GeForce 6800 Ultra in SLI mode, which is not too surprising – CPU performance limitations exist even in eye-candy mode.
The demo which we call “town clash” resembles a lot of Half-Life 2 scenes that are limited by both CPU and GPU performance due to extensive amount of special effects and physics in the scene. Due to CPU performance limitations we can only say that the GeForce 7800 GT runs on par with other high-end graphics cards, save for the GeForce 6800 Ultra, which delivers a bit slower speed.
To our surprise, the good-old RADEON X850 XT PE managed to outperform not only the GeForce 6800 Ultra, but even the GeForce 7800 GT by a small percent point. Still, modern graphics cards are so fast that even in 1600x1200 resolution and eye-candy enabled all the boards deliver absolutely comfortable frame-rate.