im wondering how much better performance i can get with two hd 6850's instead of just one. i have a phenom x4 9950 cpu and 1 6850. i have a 650 watt ocz power supply. i want to run gmes like skyrim and bf3 at highest settings with 50 - 60 fps. i watch my cpu usage in both games and its extremely high. is that my bottleneck? or is my video card?