2x 8-pin PCIe goes against the small and efficient belief about midrange Navi so this could mean
d: the above could equally apply to a workstation card
Well, workstation cards very rarely have so gigantic power consumption which would require two eight-pin connectors.
Most of these cards are single-slot, even without any additional power connectors.
https://www.overclockers.co.uk/pc-components/graphics-cards/amd/amd-firepro?sPage=1&sSort=3