I am upgrading my video card from an ATI/AMD R6770 to an Nvidia GTX 660ti. The R6670 was my first ATI card ever and I put it in my system when I built it. Having always had Nvidia cards before and never swapping out an ATI card for an Nvidia card or vice versa, I was wondering if there was anything beyond deleting the old ATI drivers and installing the new Nvidia drivers I will need to do. I've seen conversations before where people mention "driver cleaner" or "driver sweeper" programs. Is that something that would need to be done or am I safe just deleting old (ATI) and installing new (Nvidia). If it is something you would recommend, could you point me to some place I could get a decent "driver cleaner" program?