Hey my name is Stace, I can help you with the Sims 2.
First all computers have Graphic Cards and you need to buy a Graphic Card that has the right sort of space for your computer. All computers have different Graphic Cards for different types of computers. Go to a computer ask about Graphic Cards and you will recieve a booklet. Choose which Graphic card you want and so on.
I hope this helps it worked for many of my friends.
Stace xx