Doom III has always been a strong point for NVIDIA GeForce 6 and 7 hardware and it is no surprise that the RADEON X1800 hardware is behind the GeForce 7800 in this test. But take a look at the considerably narrower gap between performance of the model X1800 XT as well as the GeForce 7800 GTX!
This should probably be attributed to much higher frequencies as well as availability of 512MB frame-buffer on the latest RADEON. The RADEON X1800 XL cannot boast with speed higher than that of the RADEON X850 XT PE product.
We can observe the same picture in another demo sequence recorded in Doom III. While the numbers are generally higher, the gap between the top-end offerings has shrunk for sure. The RADEON X1800 XL, unfortunately, cannot manage to compete really well the GeForce 7800 GT.
We should note that virtually all high-end graphics cards today can play Doom III at comfortable speeds at up to 1280x1024 with all eye candy enabled. The GeForce 7800 GTX – the unconquered champ – can even allow to play at up to 1600x1200.