so I have 2 gtx 670s and im running i5 750 at 4.0ghz u probably can see the specs below but what I wanna ask is that how one game for example bf3 uses 80% cpu utilization and gpu usages are around 70 to 95% jumpy and getting between 80 to 130fps on the other hand metro utilizes gpus at 97% percent constantly and cpu usage is at 40 -50% and im getting 55-95 fps but average is 75fps there r many games like that cpu is not utilized a lot and gpus are going crazy and some games gpus usage is all over the place or low where cpu is goin high. how can I know that my cpu is not bottleneckin my gpus