it would, but because you have bought a dell im 99% sure your graphics chip will be on your motherboard, therefore u cant just unplug it and put a better on it. instead ul have to stick with a pci graphics card. I think the highest ones of these there is is a fx5200 or radeon 9200. both cards are not meant for gamin by any means.
That is one of the main reasons most people on here hate dell computers.
sorry cant be more help mate