The Radeon 7000 should be much better. It has more bandwidth and more fillrate and memory bandwidth saving technologies. I think the TNT had 180megatexels/sec and around 2GB of memory bandwidth and the Radeon 7000 outperforms all of these.
"If everything you try works, then you are not trying hard enough." - Gordon E. Moore
Desktop:
AMD Athlon XP [email protected] (11.0x210) | EPoX EP-8RDA+ | 512MB Crucial PC3200 | VisionTek GeForce4 Ti4600 | nVidia SoundStorm 5.1 | 160GB 7200RPM Western Digital | 48x/12x/48x Lite-On CD-RW | Lite-On 16x DVD-RW | 19" NEC AccuSync 90