My computer is equipped with a TP45E Biostar motherboard (1600 FSB & PCI express 2.0 16x), 800 Mhz DDR2 RAM, a Geforce GTS OC 250 and a 3.16 Ghz Core 2 Duo CPU. I previously was using an HD 4670 ATI graphics card, and I seem to be achieving the same performance despite the graphics card upgrade. I am running Windows Vista. Is it possible that one of these components is holding the system back? Any help would be greatly appreciated.