PC shutting off at random times (GPU's updated, Temperatures normal, No error logs)

[clarke.plays]

Graphics Card - NVIDIA GeForce GTX 1080
CPU - Intel Core i7-6700K
Motherboard - HP 81B6
RAM - Ramaxel DDR4 SDRAM UDIMM


I've tried updating drivers, checking temperatures, looking for error logs; I've looked at some previous posts on similar things and tried them but can't seem to get it to work. Not really sure what a CMOS is though.

 

[logainofhades]

What is the make/model of the power supply?

 

[clarke.plays]

What is the make/model of the power supply?

1300 W AC power adapter
But thats kinda all I know. Should I open the case to see the actual make?

 

[logainofhades]

Yes, you should. Wattage means little, if the make/model is junk.