I was chasing my tail for days trying to setup a 6800k overclock, getting black screens and luxmark crashing just like in your screenshot, turns out it is indeed a gpu issue there is an open issue with luxmark crashing on pascal gpus as listed in the release notes for even the newest nvidia driver, to verify it is a gpu issue you can select benchmark instead of stress test and only select h264 video encoding, or you can run the x264 stress test people have been using on haswell chips for years or run realbench stress test with a non pascal gpu. Until nvidia fix this issue do not use realbench stress test as it is not reliable on pascal gpu based systems and you will go crazy.. Hope that helps!
Arne Saknussemm wrote:
Very often a clean (use DDU) reinstall of graphics driver solves this issue.
Been posted up here many times if you have a quick search.
There are some issues with Pascal and latest drivers though.