I'm wondering whether it's possible to upgrade the graphics card? I bought Sonic Generations, and on the lowest settings I can run it, but it sort of chugs along. What's the cheapest graphics card I could buy that would make it run smoothly that's compatible with my desktop?
If you want a discrete card you will need a new power supply as well.
What is your resolution, and what games are you wanting to play/ performance do you want? It also doesn't specify pciex16 slot for the card, can you take a look and confirm this?