Thanks to ATI's adaptive filtering techniques, anisotropic filtering was twice as fast as with the GeForce 4 Ti 4600. Even the slow Radeon 9000 PRO clearly outperformed the NVIDIA cards. NVIDIA is in fact well aware that it needs to deliver better performance with anisotropic filtering, and the new GeForce FX will also incorporate adaptive techniques. It remains to be seen whether it will also be applied to the GeForce 4 cards as well. In theory this is unlikely, as NVIDIA has been talking about custom designed circuitry for the FX. We'll just have to wait and see.