I am having some problems with my pc.The problem has started recently.When I open a game my pc became slow and the game stuck everywhere.In a word the doesnt run smoothly.Even some downloaded games like Milky Bear 3 doesnt run smoothly sometimes.But sometimes my pc can run games smoothly.I still having this problem.Without gaming other works with my pc is fine.The problem only starts when i open a game.I have reinstalled my windows 7.But i cant get rid of this problem.My requirements are:intel core i3 530 2.93Ghz,ram 6gb,windows 7 32 bit & ati radeon hd 4300/4500 series.Is this my gpu problem?