cfg alterations ?

I read on a post ages ago that changing this line to something else in the cfg file made the framerate better
[DISPLAY.Device.NVIDIA GeForce4 Ti 4200 with AGP8X.0]
does anyone know what i change it to i think its nvidia drivers 2000 but cant remember the exact line ?
[DISPLAY.Device.NVIDIA GeForce4 Ti 4200 with AGP8X.0]
does anyone know what i change it to i think its nvidia drivers 2000 but cant remember the exact line ?