I haven't heard about this. I have a Geforce Ti4600 and it works slick with Tux. nVidia's driver installer is the best out there IMHO. It can query Nvidia servers for the most recent version and download and install itself, I like it. As for preformance, the native Linux games (Enemey-Territory, UT2004, Quake3) all run faster on Linux than they do on my Windows partition. Its not like a day and night difference but the FPS don't lie.