An unnamed, undressed dual-GPU prototype of AMD's latest in southern-island graphics cards surfaced over the weekend. Flaunting twin Bart chips with 1,120 stream processors a pop, this card totals up at 2,240, with each GPU packing its own memory for a total of 2GB of GDDR5. Although PowerColor is staying tight lipped on specs and official name until Computex in June, two DVI ports, double mini DisplayPorts, and one HDMI-out paint obvious similarities to the existing Radeon HD 6870. One last notable difference? The unknown soldier is powered by two
