pc reboots by it self windows 10  

So no dump files are being created.

So you are back to square zero.

You will have to do your own testing.

I would start with memory. At least eight passes with memtest86+

And you ran this Driver Verify


Enable and Disable Driver Verifier in Windows 10

It is not that all drivers are up to date, it is all drivers are correct. Some vendors, although we don't see as much these days, tweak drivers. So a generic vendor driver or worse a MS generic driver will not act the same.

Hopefully another member will have a better idea. Myself I would start at square zero and do it all again.

On the subject of drivers you could also audit installed drivers against your Motherboard drivers at their site. If Windows has loaded a generic driver where your vendor has a driver you could replace.

You said that shop swapped power supply. Is the swapped one still installed in PC. Not sure how they would have tested this swapped power supply with your game.

Okay, thanks for clarifying.

I wonder how they tested, and for how long, putting yours under load ?

I think you said you clean installed Windows, correct?

If you did and installed just one game and got this I would be suspecting hardware error.

So you are into swapping out piece by piece. Not exactly sure what you have installed but I think as they tested PSU and memory that leaves you with Video card or very hard to trace Motherboard issue.

Do you have the ability to connect monitor directly to MB and remove video card? I know this is not a desired end state but this is going to be a process of elimination.