It is the board of a friend , I manage it. It has 3 GTX 1060 3 Gb from Gigabyte. Now I am being told it runs for 1 hour or several hours and then nicehash stops responding. I will try gen1 and also I have to update to 1709 in Windows and also to latest driver. Will try all of these and report back today or after a few days depending on my time, although I will try to fix a few things via teamviewer , updating to latest 1709 of Windows 10 and latest GPU driver.

Still no TDR Video Failure anymore.