I have always deleted and re-installed drivers for graphic cards when switching them out. I'll be switching a EVGA 560ti for EVGA 660ti shortly. Do i really need to delete and re-install for this? I'm fine doing it just curious if not doing could cause issues?
IMO when switching graphics cards, its best to do a clean install. When you load up the driver install program it should give you an option for custom installation, choose that, then check the clean install box. Should work fine :-)