so hunting for this is a waste of time? weird thing. I just had a following test:

mine with one card, take measuremtn which was 215w
now add a second card -> measures 335w
difference is the second card as is 120w. rocm-smi software measurement: 95w

I have a 8x1060 rig where the nvidia-smi is telling that one gpu consumes 75w which is accurate off the wall 680w. I regret them atis so much