My Sapphire 280x toxic cards continue to hang almost every hour or two. I tried every possible settings for power, clocks, intensity, VM set to 24 GB and nothing works. Most of the cases -wd 1 or -r 0 options manage to restart the miner but sometimes the zecminer window is frozen, I can't even manually or with killing with the task manager close it. Is there a script that can recognize when a zecminer window is not responding and then restarting the windows? I know that -r 1 can restart but I don't want to do it so often. It will waste too much time since in 4 out of 5 cases -r 0 does the job.
Use v12.1 and be calm
12.1, even 11.xx is the same story
Nearly every time I have an issue like yours I'm able to fix it by turning off the rig, unplug the video cards from the risers, unplug the risers from the mother board, unplug the pcie cables from the video cards, unplug the pcie cables from the psu. Next I put it all back together and assure very good connections. The has fixed my issues every time.
What I usually do is simply shit it down and re affirm all connections but I follow the above procedure if just re seating all cables without disconnecting everything fails.