How would I got about install a different video card compaines drivers?

Hey everyone. I have an ATI card right now. Would I just install the Nvidia drivers before I install the card, then take out my ATI card and put the Nvidia card in. Afterwards I delete the ATI drivers? Or can I just leave them there and they won't do anything? By the way, I'm upgrading from a ATI Radeon 5450 to a Nvidia GTX 560 Ti. Thanks!|||First of all you are doing right thing by changing your graphhics from ATI to nVIDIA. No, you need to uninstall the drivers of your previous graphics card. If you dont uninstall the previous drivers then they might conflict with each other. Remember prevention is better than cure.