Okay, so in comparison with xmrig's speed 3,5kh, with this SBRMiner my RX580s are hashing 820h/s on cryptonight heavy!!! Incredible performance! I am currently with intensity 32, because if I get the intensity higher, I have noticed that after some time some cards start hashing around 550h/s(dropping by 300h) .
Running stable with 4150h/s on my 5 cards @ 550W from the wall. Great work man, hands down!