Worst : Gefore 2MX before understanding it had gimped shaders. Took me getting a Geforce 2 64Mb a couple years later (and Geforce 4 MX in between lol) to see the diff. Best : ATi 9500 Pro 128Mb, overclocked like a champ with an aftermarket cooler. 8800GTS/640Mb, also overclocked like a champ. Ran Crysis at ~Ultra Levels no problem (I went through all the settings, and found the 2 that took the most shader power, The waves detail was one, and the other was shadows iirc, dropped them both down one notch).