so i just upgraded my psu and graphics card. my psu is now 500w and i have a 2gb evga gtx 550 ti. im getting pretty good performance in games, but not quite as good as other people that have the same card say. my cpu is amd phenom x4 9750 2.4 ghZ and my ram is some cheap ddr2 2gb (i have 2 of them) ram. i was just wondering if my cpu and ram are bottlenecking my graphics card.