Okay, after 3 months of mining during the last couple weeks rig has been freezing and the last line of the log file indicates:
GPU got incorrect temperature 511 ignore
Thoughts?
I got this error when one of the fans on an RX580 failed. I don't know how long it was running with one failed fan but when I noticed the failed fan the card was very very hot !
In that case, the temperature was so high that the card itself couldn't measure it and that's why you got GPU got incorrect temperature 511.
That's my guess.
No, the card didn't respond - so it returned an code meaning invalid, which is what you see.