The Sims 2....what a headache. What video card do I need?

[supergirl1321 0]

Hi all, I know that soo many people have this problem with the game. It took me soo long to scrap up loose change to get the Sims 2 and of course it won't play. I know that my video card isn't supported. So what I need to know is, what kind of a card do I buy. does it matter what brand of a computer I have, or is it one size fits all. I have a Gateway. I don't know much about the game card deal, if someone out there could help me I would greatly appreciate it. thanks!!