Hello
I made 4x 580 and 1x 590 rig and it's mining fine but 3x cards giving me 24MH/s and the other two are giving 29.99MH/s. I bout all of those cards secondhand and I am not sure if they ever Bios modded or mined before. When I run the miner I get error message "AMDWinTweak error" and sometime I never get this message at all. With this settings I am loosing 14-19MH/s every month around $35-$40 (current ETH price). Secondly I can't reduce my power consumption, if I try to lower voltage with MSIAfterburner even by -1, my pc hangs but it doesn't restart Please let me know if something can be done to do it better!!
Please see the screenshot attached
https://i.imgur.com/lrq1HoJ.png