I recently bought an Evga Geforce gtx 750 ti, and i noticed it was running at the speed that it should. Basically i opened precision x because i was going to overclock it but i saw that my gpu core clock was only at 135mhz but here, http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-750-ti/specifications , says it should be 1020. Any idea why it may be clocking low?