I changed the PCI-E SFP+ Card to a Supermicro AOC-STGN-I2S
No change. But now I can see the error in dmesg:
BERT: Error records from previous boot:
[Hardware Error]: event severity: info
[Hardware Error]: Error 0, type: fatal
[Hardware Error]: fru_text: DIMM# Sourced
[Hardware Error]...