Asus shutting down my computer due top "power Surges"

[Karkanoth]

Hello,
My computer seems to be turning it's self off and on again but the loading screen as it turns on goes straight to the ASUS logo then into a weird control panel thing giving my options on what to have running and if i want the computer to run on power saver or performance.
My computer only shuts down if i have a game running at it's highest settings because my computer was build for performance. i have a 4095MB NVIDIA GeForce GTX 970 along with a 650W Psu i can't remember the brand as the computer was giving to my from my uncle for my birthday (none of it was second hand). i'm not sure if is the PSU that needs sorting out or done by the software, thank you for your time i look forward to your replies

 

[C12Friedman]

A complete rundown of hardware would be nice here to give us an idea of what we are working with, SPECCY can help with that if you do not know. The only thing Speccy won't tell us is the PSU installed, to get that you'll need to open the case and look at the PSU (which is my primary suspect at the moment)

 

[Diganta Das]

I think the PSU isn't the problem.
Rather it might be your CPU overheating or some BIOS settings done wrong. The screen that opens is the BIOS.