The error message "x64 Exception Type 0x12 - Machine Check Exception"
"An uncorrectable Machine Check Exception (MCE) has occurred indicating that the processor detected an internal machine error or a bus error, or that an external agent detect a bus error".
An MCE occurs when the CPU’s identifies a fatal hardware anomaly that it cannot correct. Common triggers for this specific exception include: x64 exception type 0x12 machinecheck exception link
: Faulty I/O controllers or external PCI cards sending "Fatal Bus Error" signals.
Download an independent, bootable memory testing utility like . The error message "x64 Exception Type 0x12 -
Even after power cycling, the errors continued, indicating a genuine hardware fault that required physical intervention.
: Often caused by a completion timeout between an adapter (e.g., SN1200E/SN1600E) and a PCIe switch on the riser board during initialization. Recommended Fixes Update Firmware : Download and apply the latest HPE Service Pack for ProLiant (SPP) to update all server component firmware. Adjust BIOS Settings Recommended Fixes Update Firmware : Download and apply
, you will see: UC=1 , EN=1 , VAL=1 .
If you encounter this exception, follow these steps to isolate the cause: x64 Exception type 0x12 in ProLiant DL380 Gen10 Server