Do you mean if you leave it on Auto the Vtt is above 1.35v at your current OC? Most motherboards seem to set needlessly high voltages when left on Auto when overclocked. This doesn't
mean it's safe though, technically running it over the max rating is unsafe. However many people run Vtt above 1.35v as it's necessary for high uncore and ram clocks. Push it as hard as you're
comfortable with, no one can tell you anything over the max is safe though.