Hello,
I got strange problem. Kind like pyramid problem, previous card always lower than next card.
[2018-10-22 17:56:05] GPU0 :    1512 H/s [T: 62c, RPM: 3673, CC: 1200 MHz, MC: 900 MHz][BUS:21] >> vega56
[2018-10-22 17:56:05] GPU1 :    1523 H/s [T: 68c, RPM: 3666, CC: 1050 MHz, MC: 800 MHz][BUS:18] >> vega56
[2018-10-22 17:56:05] GPU2 :    1698 H/s [T: 63c, RPM: 3693, CC: 1202 MHz, MC: 900 MHz][BUS:24] >> vega56
[2018-10-22 17:56:05] GPU3 :    1694 H/s [T: 62c, RPM: 3679, CC: 1350 MHz, MC: 950 MHz][BUS:15] >> vega56
[2018-10-22 17:56:05] GPU4 :    1969 H/s [T: 65c, RPM: 3698, CC: 1350 MHz, MC: 1100 MHz][BUS:9] >> vega64
[2018-10-22 17:56:05] Total:    8396 H/s

I'm using windows 10 1803 and 18.6.1 adrenalin driver.
I try even install clean windows etc still error like that. Anyone can help?
Thank you.
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Oh I forgot to mention, i just lower my core for make it to stay below 70c, and even i make it same as other 1350 900, the problem still persist.