sometimes when i touch my cards it reboots. I think the miner does it when something is not well connected. Did u try to put this in your config file?
"-r -1" It will disable reboot mode
It seems like turning the fan speed up was the most stable."-r -1" It will disable reboot mode
But i'll try -r -1.
Thanks again.
Edit: Crashed with -r -1 on normal settings.
Super stable with fan speed at 65%...
Install MSI Afterburner and set custom fan curves, I found a few of my gpu's were crashing also at anywhere from 75-80 above.. this should fix most of your crashes I think