Where can i download a video card for windows xp?

OK so i went on the website (http://svc.systemrequirementslab.com/CYR… and checked if my computer could play TES:Oblivion. It says i need a new video card, is there anyway i can download one for free that will allow me to play? thank's :) x|||video cards can't be installed via the internet.you have to take the case apart and install them in your motherboard.