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Ryzen 5000 crashes - anyone getting them?

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.
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.
 
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'm not sure yet, I'll see if it does it again. It's been totally stable otherwise (I did have corrected WHEAs when the chipset got too hot in the summer heatwave, but this didn't result in crashes). It is retail, thanks for the tip.
 
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