Asus has officially unveiled its latest ROG-branded (Republic of Gamers) motherboard, the Crosshair IV Extreme. The EATX board features AMD's 890FX+SB850 chipset combo and features a slew of overclocking functions, including the ability to tweak settings remotely over USB from a connected notebook, using a Bluetooth cellphone, and even from a new iPhone app called ROG iDirect. It also sports a of $378.