Hello, finally, i did it works, the UI is really cool and easy, the hashrate is also OK.
BUT
with windows 10 my mine (6*RX580 8Gb) use 940 Watts (dual mine eth + xvg)
with HiveOS my mine use 1150 Watts with the same config !!!!
So thats 200W more with SMOS.
My config is perhaps bad :
Core MHz: 1150
Memory MHz: 2120
Core Undervolting: 840
Powerstage: 0
So i understand that's not possible to get better undervolt result with SMOS.
I return to Windows 10 because 15 rigs * 200W it is 3000W gained ! cannot pay that for a good UI.