Question PC crashes (shuts off completely) when CPU comes under load

Mar 21, 2023
(System specs below)

As the title states, my PC shuts down completely any time I put the CPU under load. I have had this pc now for a few months (Dec '22), never coming across this issue. However, as of last week (in the week of 13 March 2023), whenever I run a game or launch CineBench, I hear a click from the psu and the pc turns off. Naturally, I find a kernel power 41 code in the error center. There were little changes in this week: I have not carried the pc around, nor did I install new software. As far as I can tell, there was only a windows 11 update KB5023706 and an intel update

Do you have suggestions for the root of my issue? Things I tried, but which haven't resulted in anything:
  • Update BIOS (currently on version F4)
  • Update all drivers
  • Reseat CPU and cooler. Reapplied thermal paste. (after this step, i could game for +- 30 min then it shut down again)
  • I've checked the all power cords to and from the psu for faulty connections (none found)
  • Cinebench run: temperatures spike to 80-90 C in a few seconds, after which the problem occurs.
  • I have put my GPU under heavy loads in benchmarking software for 15 mins, which does not result in a shutdown.
System specs:
OS: windows 11
CPU: I7 13700k
Motherboard: Gigabyte Z790 Gaming X AX
Ram: Corsair Corsair Vengeance DDR5 - 2 x 16 GB - 5200 MHz
SSD/HDD: Samsung SSD 980 Pro 1TB
GPU: RTX 4080
PSU: be quiet! PURE POWER 11 1000W
Mar 21, 2023
I'm using the Arctic Liquid freezer II 360. Unsure whether pump works, but the CPU block isnt vibrating as I would expect. Fans are turning though.

What do you make of when I reseated CPU+cooler? I could game for another 30 to 45 mins no problem. Temps were steady at around 60 C. ?