Does my pc support this processor?

Need to know what motherboard it has then check to see if it will support a better CPU. Seems it has an AM2+ Socket and will support up to a Phenom II x 4. BUT you are more likely to improve gaming performance if you spend as much as you can on a Graphics card. Check your Windows Experience Index ( Start, Rt click 'Computer', Properties, then click on 'Windows Experience Index' to see a breakdown of the components. The lowest value = the index and will probably be Gaming graphics...)