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My PC is unexpectedly rebooting
Last month I did a hardware upgrade to my PC. I changed from a Ryzen 5800X to an Intel i7 13700KF with a new Gigabyte board. I applied all of the Intel mitigation microcode updates, and all drivers, ...
Ensure your power supply (PSU) can handle the load of your system. Consider a PSU calculator to estimate required wattage.
The psu Calculator of seasonic or Bequiet are quite competent.
I would also consider to update the BIOS and load setup (cmos) defaults and leave XMP disabled. Myself had these crashes and ultimately it turned out that 4 ram modules would not work with Intel memory Controller at 5600 MT/s but need to lower to 5400 MT/s.
Mem test86 helped me to identify this