AMD's 6000 and 7000 series graphics cards have the DisplayPort 1.2 standard. This standard makes it possible for a single port to drive up to four monitors. To accomplish this, an MST (Multi-Stream Transport) is needed. Up until today, we haven't seen these hubs hit the market, but Club3D has released the first commercially available MST hub, which they conveniently call the Club3D MST Hub.
The Club3D MST hub makes it possible to connect up to three DisplayPort monitors with a FullHD resolution, at 60 Hz, over a single DisplayPort 1.2 port. Higher resolutions or refresh rates are probably not supported due to bandwidth issues. The Club3D MST Hub will have to be powered, as the power draw from three DisplayPort ports is higher than what a single DisplayPort can provide. The unit, therefore, ships with a power brick. The unit should also be compatible with all the Radeon HD 5000, 6000, and 7000 series graphics cards, assuming they pack a DisplayPort port.
The Club3D MST Hub should hit the market within a few weeks with no official word on pricing yet. Pricing is expected to be between €125 and €150 in Europe, which translates to roughly $160 to $195.