I'm using RX 570's and get 29.1 MH/s on ETH and 466 MH/s on Sia

EthDcrMiner64.exe -epool us1.ethermine.org:4444 -ewal 0xF45c49cC99Be92723A46e26097460c57F7D01E1C.rig1 -epsw x -dpool stratum+tcp://sia-us-east1.nanopool.org:7777 -dwal fc7a646c46e0e2d445f1582cdd3620ff0086b6fa4848153fc1c3c6009500e9bc204bf8fc9df4/rig1/myemail -dcoin sia -dcri 16 -cclock 1140 -mclock 2050 -cvddc 850 -tt 72 -fanmin 50 -fanmax 90

But with the voltage at 850 the cards actually run at 0.818v for some reason but it's stable