I'm new to choosing computer parts and I'm looking into buying a new GPU (Graphics Processing Unit) for gaming. However, I don't know if my CPU will be compatible with a new or high end GPU. My CPU is a AMD Phenom(tm) II X4 830 2.8 GHz quad core. My current GPU is a nvidia gtx 210 (Yes I know there old). I have around $200 to spend on a new graphics card and CPU if necessary. I'm not really looking into playing the newest games and i don't mind playing at low graphics on 1920x1080 or 1280x720. The system manufacturer and model is HP p6620f. A 725W power supply and 16 gb of ram.