Two images of a printed circuit board (PCB) have been posted on Beidou that could be part of AMD's upcoming Navi graphics cards. The AMD logo can clearly be seen on the PCB and there is an obvious space for a GPU. The PCB in the pictures is still covered in a protective film.
https://www.notebookcheck.net/Images-of-possible-printed-circuit-board-for-AMD-s-Navi-graphics-cards-leaked.419688.0.html
That would indicate flagship power consumption with that pair of 8 pins, and a 256 or 512 bit GDDR memory bus