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

What the hell does that mean? Since I got this message, rig has been doing this at random times. Sometimes it'll take 7 days, sometimes 5 days. I just don't get what's wrong with my rig.

If these are failing risers, they shouldn't even last more than 24 hrs mining, but they're stable AF until this message.

6x 580s
Win10 Pro
Modded bios 1160/2100/875
Claymore v9.8
Aug11 blockchain drivers

Thoughts?