I went through this a little while ago myself. I tried a BUNCH of different versions on an MMX233 system. Maybe it was CPU limited. I didn't see a huge difference from one to the next. Gererally, this is what other people more in the know on TNT cards than myself say: Many people still like the 3.xx drivers. They are not DX7 level drivers, however. The 5.xx are thought to be the best, 5.22, 5.32, 5.45. 6.xx det 3 drivers are more geared towards GF cards. The setup I had was for my Nephew. I tried some D3D games and really couldn't see much difference from one to the next. I wound up using 5.45.