I want to upgrade to a 7770 GPU. I am concerned that there will be bottlenecking because my processor isn't the best. Will this happen and what would be the best card this system can support? I would like to keep my PSU but if I have to upgrade it as well it would be alright.
The processor is OC'ed at 3.7ghz and the 5670 is maxed out in MSI afterburner.
System currently runs Starcraft 2 on max settings at 30 fps and Minecraft at 130 fps.