ATI RADEON X1800 XT and XL Performance: Crushing NVIDIA's 7800?
 

While generally speaking the whole RADEON X1800-series family deserves a credit for nice performance and feature-set, it comes more than a quarter after the GeForce 7800 GTX, which offered similar speed and capabilities. Unless ATI manages to flood the market with the models X1800 XT and X1800 XL, success of the whole family will be under question mark. To say in short, ATI needs volume availability as soon as possible and, as a result, price drops, of the whole RADEON X1800-series in order to fight high-end market back from NVIDIA.

http://www.xbitlabs.com/articles/vid...eon-x1800.html