Final Cut Studio 2 Graphics Requirements?

I was looking at the Macs on the Apple Online Store. I couldn’t tell if the graphics in the iMac would work with Final Cut Studio 2. I got on a chat with an Apple worker. The lady looked into it for me, and said the only Mac that could run Final Cut Studio 2 is a Mac Pro. Then I got off of chat with her. Then, after looking into it further, I found out that the same graphics cards you can put in a Mac Pro are put in a MacBook Pro by default. I’m confused… What computer can, and cannot work with Final Cut Studio 2?