Hi i got an AMD 7970. The problem is simple, is getting old and new tech at least in my country is really expensive so i got a plan, i'm buying two 280x one with artifact problems and the other cheap for no reason. Well my idea is to run dx 11 games at good fps. It is a bad o good idea? What do you think? Should avoid the one with artifact problems? I got an xfx 750w, it's enough?