^+1. You've got an Intel processor, not AMD. It's old, but it isn't the main problem. You've got a basic HTPC video card that may not even load some of the newest games. At your current relatively low resolution, a HD7750 or HD7770 would be appropriate choices; the older HD5770 or HD6770 would be ok too. Which one you should get will depend on the quality of your PSU as well as your budget. A 380W Earthwatts would handle any of them, but a cheap "500W" generic PSU-shaped object would choke, smoke, and croak except perhaps on the HD7750. You'll need to open your case and identify the PSU.