Hello Everyone,
I have Ryzen 7 2700 and Asrock B450M Pro4. Before Ryzen there were installed Athlon 200GE and I didn't have daily crashes. After changing to Ryzen 7 I've found this trouble.
One VM with Windows 8.1 on my Proxmox 6 sometimes utilize CPU over 100% (2Cores). I have changed CPU from Host to QEMU 64 and now I have uptime over 4 days.
No BIOS changes, kernel changes, python c-state hack from github didn't help me as changing CPU.