The PowerColor X1900 XT is not slower than 88fps at its default frequencies or than 94fps at overclocking. This is enough for the most fastidious lover of 3D shooters. The memory controller in the ATI R580 chip boasts a higher efficiency than the controller from the Nvidia G71 – this is why the GeForce 7900 GTX is about 10% slower than the PowerColor X1900 XT, although has a higher memory frequency.
It’s different on the Research map where version 3.0 shaders are used. In resolutions above 1024x768 the Radeon X1800 XT with its 16 pixel processors looks poor against the GeForce 7900 GTX and the R580-based cards. The PowerColor X1900 XT is successfully struggling with the Nvidia flagship, both delivering a frame rate of 110fps and higher.
Although Far Cry’s HDR support is implemented imperfectly for ATI’s Radeon X1000 cards, the PowerColor X1900 XT allows using the HDR mode in resolutions up to 1280x1024. When overclocked to 675/800 (1600) MHz, it even makes the resolution of 1600x1200 playable.
The performance of the cards is generally higher on the Research map since it is a closed environment. As usual, every megahertz is important in the game’s HDR mode, and overclocking gives the PowerColor X1900 XT a boost of 20-30%, lifting it up to the level of the Radeon X1900 XTX.