I have a system with an amd phenom 2 925 x4 OC'd to 4.1ghz a foxconn aloe motherboard 8gb of ram a generic ssd and a 450w psu that is nowhere near its limit with my current gpu which is a ATI Radeon xfx HD 5700 I'm looking for the best gpu I can buy that will work at full potential without being bottlenecked by the cpu motherboard or ram what would you guys recommend also I will be updating the ram specs soon