Is this a different issue to TrueNAS Scale Crashing every few days - #4 by Davvo
Do you have the latest mobo bios? https://www.msi.com/Motherboard/B550-GAMING-GEN3/support
Disable anything that you’re not using in the BIOS, remove and overclocks, ensure you have no temperature issues and disconnect any non-essential hardware while trying to determine what is wrong.
What chipset is the EBay 2.5gbe Network (wgetech W2511-SR)?