Proxmox server freezes with an MCE hardware error

A personal Proxmox server has been freezing at random times during the week. The services are not , so the problem has not caused major damage, but the pattern points toward a issue. The monitor showed error lines including “Machine check events logged,” “System Fatal error,” “CPU:1,” and “cache level.” The machine is an older AM4 gaming PC with a Ryzen 7 5800X and an ASRock X570 Phantom Gaming 4 .

The server was still reachable after the message appeared, and services could still be accessed. The main need is to understand how to read the MCE log and what checks should come next.

Key points

  • The Proxmox server freezes randomly several times during the week.
  • The screen showed an MCE error and a “System Fatal error” line.
  • The is an older AM4 PC with a Ryzen 7 5800X and ASRock X570 Phantom Gaming 4 .
  • The server was still reachable after the appeared.
  • The next useful step is -focused based on the log.
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