I recently purchased geforce 660ti 2gb my other components are the asus p5k with quad core 6600 and 6gb of ddr2 ram! Also purchased a 700 w power supply but I'm still noticing some lag on games! Have a feeling its the processor maybe bottlenecking? I'm not an expert of these should I upgrade mobo and cpu or is just a case of overclocking my cpu for now ?