Hello... without changing drivers/APPS or any other OS settings... Windows has a basic VGA driver it will default to, if it doesn't recognize the Video card ID. This is a "Fast Start" option, and eliminates the possibility of you deleting the wrong things... You can always plug the OLD card back in if you need too. But check first to see if the OS/MB/BIO's will use your NEW card with your OLD system, as a fast first try option. B /
I can plug 3 different GPU's into my MB and Windows is up and running with them... Windows uses/reads Hardware ID's to install the proper driver for them.