Hi Jorge,
Thank you, yes I've been running the latest BIOS for a few days, it has been better but still unstable with c-states enabled. Enabling Native and Platform power everything is stable but once I enable c-states (turn everything from auto to enabled) and the disks spin down and the system starts to go into high c-state a reboot will eventually happen. Even turning on power loading, the system will still eventually reboot.
System without any power saving turned on - Stable 4months
System with Native ASPM and Platform Power enabled - stable 2 days so far
System with c-states enabled bios from dec, instant crash when disk spin down
System with c-states enabled latest bios as of April 23rd 2024, random crash (1-7hours) after disks spin down.
I guess its either a Motherboard issue (BIOS bug or hardware) or a CPU issue.
Submitted inquiries to motherboard and cpu manufactures.