error watchdog on all GPU

since then I have dismantled and cleaned for dust and
I installed ubuntu 16.04 with amd blockchain 17.4 drivers compatible with this version of linux
but now i have another error
the rig is spinning but freezes after 1 hour, I guess it's from my network but I'm not quite sure,
but when it freezes and I unplug the network cable, but other rig finds the network connection otherwise it loses

I am no longer the watchdog error but the network connection cuts and crashes