If GPU-Z can be trusted:
Vega FE Air's
GPU_0 = -cclock 1137 -mclock 1050 -cvddc 950 = 40.4Mh/s 51C, 78% fan, 15C ambient = 158w
GPU_1 = -cclock 1137 -mclock 1100 -cvddc 950 = 42.4Mh/s 55C, 66% fan, 15C ambient = 168w
I ruined the earth ground on the killawatt I borrowed, so I currently cannot take a wall measurement.
you need to add approx 60-70watt to what gpu-z says
I would guess (extrapolating on the polaris power consumption) that memory part while running eth would require more than 60W. I'd guess 80+W is more likely