New build shutting down completely after 60 - 90 mins of Starfield

[Bluey71]

As the title says really, the shut down is just as though a switch has been thrown. Is there a way I can log why this is happening?
All the drivers have been updated etc. The build went well, with no major issues that I am aware of.

My kit -

CPU - AMD Ryzen 7 7800X3D
CPU Cooler - be quiet Dark Rock pro 4
M/board - AUSU TUF Gaming B650-Plus WIFI ATX
Memory - Kingston FURY Beast 32gb (2 X 16gb)
Storage - WD Black SN850X 2TB
GFX Card - Asus Gaming TUF OC GeForce RTX 4070 Ti 12GB
PSU - Corsair RM750X W 80+

Any help much appreciated, Bluey.

 

[Bluey71]

Thank you everybody for your input. I have done some testing as requested using a monitoring program. The initial result was CPU package of 89.2 which was in red.
I then went into the bios and noticed CPU fan speed/performance was set to standard, I'm pretty sure I had set it to a higher rating previously.
So now it is set to that higher rating and the last test showed 82. So much cooler.