X16R/Nicehash
Vega56 7 hrs average = 17 Mhs (1352gpu/900mem)
Vega 64 LQ 7 hrs average = 25 Mhs (1402/900)
average 7hrs power consumption on the wall 180W/GPU
Your Vega56 figure seems low... You should be closer to 21 (at least that's what I was getting when testing). Could there be anything slowing you down? Have you plugged a monitor to that GPU maybe?
Here 15 hrs stat. GPU0,2 - VEGA56 (flashed to 64), GPU1 - VEGA64 LQ
Stats Uptime: 0 days, 15:34:41
[2019-06-08 14:51:15] GPU 0 [60C, fan 0%] x16r: 16.52Mh/s, avg 17.50Mh/s, pool 17.07Mh/s a:2224 r:4 hw:0
[2019-06-08 14:51:15] GPU 1 [66C, fan 96%] x16r: 23.48Mh/s, avg 25.28Mh/s, pool 24.47Mh/s a:3197 r:4 hw:0
[2019-06-08 14:51:15] GPU 2 [61C, fan 0%] x16r: 16.56Mh/s, avg 17.66Mh/s, pool 17.02Mh/s a:2233 r:3 hw:0
[2019-06-08 14:51:15] Total x16r: 56.56Mh/s, avg 60.44Mh/s, pool 58.56Mh/s a:7654 r:11 hw:0