first, what do you mean when you said UPGRADED my video card??are you talking about onboard video adapter,an older card,or 2 cards on one system.
most likely i think you are referring to onboard chipset-usually there are 2 option to disable an onboard vga card.either you can check the bios and disable it from there depending on which bios you have the second is to change the jumper on your mobo if the option is present to disable it from your mobo.you might want to try googling a bit to find out about your mobo.to find out which mobo you have first you'll need to find out which chipset you have intel,via???? then download a utility which will help you check your mobo.