GPU fan full speed/no signal while playing

[D4nny019]

Hi, just a few minutes ago, i was playing as usually, while suddenly my GPU fan went 100% and the monitor had no input.
After rebooting the PC, everything was back to normal.
What the hell happened? Any ideas?

Thanks
GPU: MSI R7 265 (2GB)

 

[Darkbreeze]

What is your PSU model and brand?