A:AnswerBanana,
Thank you for your inquiry!
No proprietary parts are used in the system, so there are a wide number of graphics cards that can fit it. Which one would be recommended would depend on what you are wanting to play, and at what settings, etc.
Our friendly CLX Customer Support Team will be glad to help you find the right option among the offerings here at Best Buy, to meet your needs.
Simply contact us toll-free, at 855.490.2569.
Thank you