Looks like faulty hardware, might be any of:
power supply
mainboard
faulty/dirty pcie slot
graphics card
Maybe try another slot first or remove/reseat the graphics card. Then check if it works in another pc.
Subject: xorg-server 1.16.4, crashes total random on GeForce 980 Ti
Description: Crash system is total random, I can log over SSH and generate nvidia bug report and I send 3 times before, but nvidia team don’t get my reports to check what is problem. I personal try next actions:
Test official release 375.26 and beta release 378.09
Clean PCI connectiors on Graphcis card
Change PCI port on Motherboard
I uplad 3 times nvidia-bug-report but have zero respond by Nvidia team.