It’s characteristic of Half-Life 2 that the speed ceiling for ATI’s solutions goes higher than for Nvidia’s as you can see in 1024x768. In higher resolutions of the “pure speed” mode the average performance of the PowerColor X1800 GTO and GeForce 7600 GT is similar and over 70fps in 1600x1200. This is more than enough for normal play.
The game uses high-resolution textures, so the 256-bit memory bus of the PowerColor X1800 GTO comes in handy in the “eye candy” mode. ATI’s mainstream solution looks better here than the GeForce 7600 GT and provides a comfortable frame rate in any standard resolution, including 1600x1200. The opponent is lagging behind by 10-20%.