So i purchased DDR3 1600, and when i go into the bios it's default value is 1333. I have the Asus p8z77-v motherboard. I noticed i can set the DDR3 manually to 1600, but then my cpu automatically overclocks itself, not high, maybe like 20-30 htz, however that is irritating considering i wanted to start playing around with the overclocking when everything was set at it's base value.