Doom III is a yet another game that does not favor ATI’s graphics accelerators, hence, the results are pretty obvious.
RADEON X1600 XT only manages to leave behind the model X700 PRO, but cannot really compete even with the RADEON X800 XL, not talking about GeForce 6600 GT or more powerful products. For users of the RADEON X1600 XT only 1024x768 resolution will offer enough speed.
The situation does not change much with eye-candy activation. The RADEON X1600 XT does not bring the real performance to Doom III, at least in case of maximum quality settings.
Another Doom III demo shows higher framerate, but the same positions for graphics cards: the GeForce 6800 GT is the best card to play Doom III at $299 and below, whereas the GeForce 6800 provides enough speed even for 1600x1200 at the price of below $199.
RADEON X1600 XT, which manufacturer suggested retail price is $249 for 256MB version, cannot outperform even the RADEON X800 XL, which now costs about $249 as well.
The situation in eye-candy mode looks similar, but now the RADEON X1600 XT succeeds in achieving framerate of the GeForce 6600 GT.