Weirdly, just had the same problem in March of 2023 @Martin
Unclear to me what is the cause - hardware or software.
I am running the HWinfo 7.40-5000.
Ryzen 5 5800x was limited to 1.3vcore (LLC values were not touched), the CPU is running PBO. It's cooled by an MSI AIO K240 (Asetek made, with a...