Currently I have a computer with a Quad core Fx-4100 processor, a Radeon HD 6450 card, 8GB of RAM and a 480W power supply. I'm planning to upgrade to a Radeon HD 7850 2GB Saphirre to play high graphics games like BF3 and Crysis. Is this worth the money or is my processer holding me back? Should I Upgrade my Processor or my Graphics card. If so any suggestions? Also need to know if i need a better PSU.