doesn't matter - NO company will sell a part and warranty it to be run out of specs. Some companies make high end ram to market directly to overclockers, but read the fine print. Overclocking WILL void the ram. This is because overclocking is an inexact process and varies greatly from board to board, not to mention it taxes the parts beyond their rated specs. Esentially you're buying a beefier RAM stick that is designed to last longer, but it is not designed to be ran out of tolerance.