Serious Sam 2
Serious Sam 2 requires 512 megabytes of graphics memory on board the graphics card when you enable its maximum graphics quality settings. Otherwise the performance may be downright disappointing. The PowerColor X1800 GTO and GeForce 7600 GT do not have that much memory, so their speed at the highest settings is far from comfortable in the standard resolutions.
Note that the GeForce 7600 GT outperforms the PowerColor X1800 GTO but it’s not because of a difference in the number of texture-mapping units as is the case with GeForce 7900 GTX and Radeon X1900 XTX. The mainstream cards have 12 TMUs each, so the reason for the difference should be sought for in the engine of the game.
We used a demo supplied with the game, but measured the frame rate with the Fraps utility.