Black Edition 45nm CPUs are traditionally great overclockers and AMD’s latest ace, the Phenom II X4 955 Black Edition is no exception. This quad-core CPU’s reference clock is 3.2GHz, but a Chinese overclocking team LimitTeam_Sigh managed to push it to more than double the stock speed.

Although it’s still early in the game and we are likely to see even higher overclocks, the current record is 6696MHz which is seriously impressive. LimitTeam_Sigh used LN cooling on Asus’ M4A79T Deluxe motherboard to reach such high clocks, and it’s clear that breaking the 7GHz barrier is just around the corner.

You can check out the results here.