We have known for a while that the AMD Radeon RX 480 uses the D009 PCB that is equipped with Polaris 10. It appears that AMD will be making use of this board not only for the Radeon RX 480, but also the Radeon RX 470.
Getting a closer look at the board we can see that it has eight single-sided memory modules with up to 8GB of capacity. The board is powered by a single 6-pin connector and the power is split into 6+1 phases, this is actually more than the GTX 1080 (5+1 phases).
The reference board has four display outputs which include three DisplayPort 1.3/1.4 HDR and one HDMI 2.0.