The SOC series Radeon HD 6870 features a blue, Ultra Durable VGA Plus PCB (printed circuit board), a dual-slot WindForce 3X cooler boasting three fans (also used for the OC edition HD 6870), 960 Stream Processors, a GPU clock of 950 MHz (900 MHz stock), a 256-bit memory interface, and 1GB of GDDR5 VRAM @ 4600 MHz (4200 MHz). The GV-R687SO-1GD has CrossFireX support enabling multi-card setups, and provides two DVI, one HDMI and two mini DisplayPort outputs.
Source: TC Mag