The GeForce 7800 GTX is always ahead of the Radeon X1800 XT, but by no more than 1fps or less than 10%. The Radeon X1800 XL does worse. It is about 15% slower than the GeForce 7800 GT.
The Radeon X1800 family is no rival to the GeForce 7800 GTX 512, but the new Radeon X1900 allow the senior graphics card from Nvidia to win the lowest resolution only, 1024x768. In higher resolutions the Radeon X1900 XTX is unrivalled and the Radeon X1900 XT keeps on the same level with Nvidia’s fastest product.
In 1280x1024 with enabled full-screen antialiasing and anisotropic filtering, the Radeon X1800 XT at last manages to outpace the GeForce 7800 GTX a little, and the Radeon X1800 XL to get even with the GeForce 7800 GT. The GeForce 7800 GTX 512 is only challenged by the Radeon X1900 XTX and, in high resolutions, by the Radeon X1900 XT, too.
Nvidia’s graphics cards, except for the senior model, suffer from graphics memory misbalance problems in 1600x1200 and can’t pass the test whereas the Radeon X1800 XL does, although is equipped with exactly the same amount of graphics memory, 256MB.