An exposed PCB picture of both the Radeon RX 480 and RX 470 has spotted. As you can see the PCB has a single 6-pin connector with the power is split into 6+1 phases, which is more than standard GTX 1080 (5+1). The Radeon RX 480 and RX 470 has 4 x display outputs consisting of 3 x DP 1.3/1.4 HDR ports and a single HDMI 2.0 port.
AMD don’t officially confirm any details are of those GPUs, but we are expecting 2304 stream processors on the RX 480, with 4GB version priced at $199 and the 8GB version priced at $229. The RX 470 will cost lower, but features same Polaris architecture based on the 14nm FinFET process from GlobalFoundries.