If it’s under three years and you are sure it’s faulty you can submit a warranty claim with AMD, as long as it’s a retail chip and not OEM.I've just started getting this cache hierarchy error today on my 3900X along with an automatic reboot (no BSOD) after almost 3 years of pretty much flawless stability. It froze while trying to open Windows 11's settings and then rebooted.
I've changed nothing other than upgrading to Windows 11 a few weeks ago, installing the latest AMD chipset driver and today updating my LG C1's firmware to 3.21.20.
Is my CPU dying already?
I use HWInfo pro to monitor temps and voltage and everything looks fine.
I have an R9 3900X stock
Gigabyte X570 Master BIOS F34
32GB 3600MHz Crucial Ballistix RAM (4*8GB)
Nvidia RTX 3080 FE ReBAR and HAGS on
Corsair RM1000i PSU
Corsair MP510 960GB NVME SSD
Windows 11 64bit Pro
Edit: will disable HWInfo's new L3 cache monitoring feature and see if it happens again.