It has happened to me too (only after 2.1 and never before), and by a chance I was actually measuring stuff like temperature, GPU-usage and other relevant data like memory -usage and stuff and all was normal and super-fine.
It's not a failing GPU or PSU (it works perfectly in other heavy graphics applications), it's definitely a bug.
It's not a failing GPU or PSU (it works perfectly in other heavy graphics applications), it's definitely a bug.