I've been struggling to get my rig to work for two weeks. It was mining fine 24/7 for days at a time. Then it froze, and ever since then it'll mine for a minute, two cards will go to zero hash rate, and Windows freezes. Tried reinstalling drivers. Connecting them in various orders. No one card seems to be causing the problem. I'm at a loss here and this thing is sucking up all my time.
Win10, rx580s (one 480). 1000W evga psu. Biostar mobo.
1) DDU in safe mode
2) Power down, disconnect AC, turn on the power
3) install drv (point and click to driver dir on each device)
4) lower core and mem clocks to something very safe like 1080:1900@888mv
5) if still having issues, disconnect all connectors, and connect back, especially power in raisers (move molexes around)
also if you had it working changing the order of cards is something you should not do.