The only game I play is WoW and I'm in the middle of gluing together a new setup. I'm going with a GTX 570 gpu and am wondering about my cpu. I know WoW is more cpu intensive, but could I get away with an i3-3220 with this gpu and be ok? Or do I absolutely HAVE to get an i5 and overclock in order to get decent fps at high settings? I don't need to have Ultra, except for Particle Density. What kind of FPS could I expect under those circumstances?