Whether it will end up being known as Radeon HD 6700 or HD 6800, it remains to be seen but what's certain is that the Barts card has a dual-slot cooler, two 6-pin PCIe power connectors, one CorssFireX connector, and two DVI, one HDMI and two DisplayPort outputs. A 256-bit memory interface is apparently also present, as are 1024MB of GDDR5 memory. No word on clocks though.
Source: TC Mag