In BIOS, Ai Tweaker, switch Ai Overclock Tuner from Auto to XMP, save and exit BIOS.
I triesd it. After saving bios and reseting the power led glows but pc wont boot. When i completely shutdown cpu and then start it a message arrives saying overclocking failed.
I even tried to overclock by selecting performance mode but it overclocks ram a little from 1333MHz to 1372MHz.