Also no info about the crashes with AMD 480 cards under Windows.
Which crashes can you put screens? Normally crashes are: OC,Undervolt, Driver Crash, PSU, Riser or Miner. Can you put more information to try to see where it could be the problem?.
Are you also having a loop in the miner in case is driver crash, automaticly continues mining?.
There is a bug ticket on Github. This happens to BEAM and Aeternity.