Originally Posted by Chicken Patty
I used to install new drivers without cleaning out old ones back in the days when I wasn't so familiar with the driver cleaning stuff. However, I never ever had a problem. I have had a 9800GX2 and now 8800GTS's in SLI and never an issue. So either or, guess I've been lucky too!
I was referring more towards switching from Nvidia to ATi and vice versa. Perhaps it's certain driver combinations that fail due to some major change in the driver or something. Idk.. I've been wanting some new Nvidia cards, or better yet something with two GPU's on a PCB. Hopefully my luck won't run out.