I've been getting this error for sometime now. Along with it is a flickering black screen, sometimes it comes back sometimes it requires a restart. I've also had BSOD if I just leave it after a black screen.
I've Google suggestions and tried everything. Clean driver installs, current and old versions. Clean OS install (Win7, win10, Linux Mint), and I've tried tweaking the TDR entries as well as underclocking the GPU. Nothing worked so I tried to RMA the card. Well I was told they found no faults.
Is it worth trying another PSU or perhaps Mobo? (That is, buying a new one unfortunately)
Edit: It's probably worth mentioning that I've been experiencing this ever since I built the PC a few months ago