Press and hold “WINDOWS” key and then press R key.
Type
sysdm.cpl
and click ok or press Enter
Go to “advanced tab”.
Under “startup and recovery” click settings.
Uncheck “automatically restart”
Click ok > ok > ok.
Update motherboard BIOS and for testing purpose reset to default setings.
Remember that OC is exciting but dangerous so reset to default settings: CPU, RAM, GPU.
Also update your VR firmware to latest version.
edit
Also update GPU BIOS.