I buy a bios a mattev for my rx 580 4go (hynix)
Result 31.2 mh / s
Adjusting msi AB
-50, -75 mv
1150/2150 memory
Voltage 0.91 and 0.94
I'm glad you are happy with it

Hi All,
1st post so please go easy on me !
I have successfully managed to get a Monero miner up and running using 5 x Saphire RX580 Nitro+ 4GB Hynix memory.
Using all stock out of box settings they hash at 624 h/s
Im currently using ethos and using globalmem at 2160 and globalcor at 1215 with powertune set to 3, and globalfan set to 45, I have them hashing at 670 h/s running with the included sgminer-GM at 40 degrees.
My question is, is it worth me rebuilding the rig running windows to try and increase this hash rate? What sort of h/s do people think is achievable with these cards?
Currently my rig is pulling between 530 and 545 watts at the wall.
Any help greatly appreciated.