Hello I have just purchased the Gigabyte 750 ti after having the nvidia evga 620. But is what I want to know is do I have to uninstall all the 620 drivers before putting in the 750 ti and installing its drivers? Or can I just keep the 620 drivers and once the 750 ti is down with its drivers and all at the point should i uninstall the 620 drivers. Just want to know so I dont mess anything up as the fact that I have never changed a graphics card before. Also if their are any other precautions that I need to know for changing a graphics card please let me know. Thanks!