Originally Posted by dukenukemz
just plug your monitor into a laptop or your brothers computer instead of switching GPU's to narrow out a monitor. If you do choose to do the GPU way. Uninstall the drivers via control panel > programs and features then navigate to C:\Nvidia\drivers\ and delete the 285.62 folder or whatever version it is.
I have switched between Nvidia and ATI before (see 560 review in signature below, I switched back and forth between the 470 and 5870). Just uninstall the drivers as you normally would (via control panel) then install the ATI drivers after you install the card.