id Software claims that the performance in Doom III benefits from large amount of onboard graphics memory, however, our benchmark results do not prove this statement, even with the Ultra High Quality game setting. Only in eye candy mode there is a certain performance difference between the two GeForce 6600 GT modifications we look at today: this performance difference doesn’t exceed 1-2fps. The performance improves much more after we overclock our ASUS Extreme N6600GT Silencer graphics card: in this case it wins the first prize having beaten even the GeForce 6800. I have to stress that all NVIDIA based graphics accelerators we tested today delivered acceptable performance in Doom III in all resolutions in pure speed mode, and only in 1024x768 in eye candy mode. Just like in the previous case when we discussed the Chronicles of Riddick, ATI RADEON X700, X800 and X1600 couldn’t compete with the rivals from NVIDIA because of the inefficient OpenGL driver.
The similar situation occurred in d3dm4 game level. The only difference is that the performance level is overall higher, because the only character participating in the gameplay here was the actual player, and there were no monsters.