In games such as GTA 5 and Just Cause 3 i am getting 100% load across 3 cores of my 4690k and it lags a lot, i read somewhere that this can happen in certain open world games but i'm not that convinced after all it's a 4690k paired with 1 280x, it happens whether my cpu is overclocked or not. Any help that could shed some light on this would be appreciated, thanks in advance.