Oooh, looks like this one might have already been solved on this thread: https://forums.unraid.net/topic/194709-losing-my-gtx1660-gpu-randomly-x-daysweeks-after-a-reboot/#findComment-1589633 tl;dr looks like updating BIOS and disabled power management settings. I am remote and can't access my machine to test, but hopefully it helps someone