13900k here Asus Prime z790 also

Processor and mobo replaced processor was last and it turned to be my processor was the issue.

So… I just went through hardware replacement after replacement chasing this

I was 13900k on Asus Prime z790

Ram NVME PSU Motherboard

All were replaced in that order w/same

Then Intel stepped in and replaced the processor.

It was the processor. Start your RMA with Intel.