Hello all,

Long time SimpleMiningOS / PhoenixMiner user here, previously very happy with several 8-GPU rigs (all AMD RX 4xx/5xx).  Recently sold a bunch of rigs and with the various hardware I put together a 12-GPU rig, all Sapphire Nitro RX480 8gb.  I am running into strange behaviors, however, when after many hours of uneventful happy hashing....

• 7 GPUs will drop to 0 Mh/s
• SMos shows 12 GPUs active
• The remaining GPUs start producing incorrect shares
• -minRigSpeed is apparently entirely disobeyed because I can see the rig hashrate (~155 Mh/s)
• Ethermine eventually sends me an email telling me the rig went offline

-pool ssl://us1.ethermine.org:5555 -wal $walletETH.$rigName -minRigSpeed 375 -rmode 2 -gt 64

Clearly watchdog isn't catching this, because it appears that minRigSpeed is being ignored in this situation.  Any ideas?