The Guru of 3D posted a review on the ASUS Maximus V Extreme
We review the ASUS Maximus V Extreme. There is a kind of people that feel enough is not enough, they want moar' and for exactly that kind of enthusiast end user ASUS creates ROG EXTREME products. This is a ROG (Republic of Gamers) motherboard, and that means extra enthusiast features alright, as for overclockers, here's where things start to get serious, the board is designed with a 12-phase Digi+ VRM, Subzero Sense, has voltage-measurement points and the ROG Connect technology (overclock the board via Bluetooth from their phone).ASUS Maximus V Extreme Review
And yes there's still more, ASUS throws in the OC Key as well, which creates an overlay on the active DVI monitor to adjust overclock settings in real-time without using additional software or hardware (it connects to the graphics card DVI port). The ASUS Maximus V Extreme just breathes overclock potential. Read the article right here