When facing a Machine Check Exception, remember: this is not a software problem you can patch away. The error demands attention to the physical components of your system. By methodically testing each potential failure point, you can restore your system to reliable operation and prevent future occurrences.
The System Bus and Inter-socket Interconnects (e.g., Intel UPI, AMD Infinity Fabric) The System Memory Controllers (DRAM interfaces) Integrated PCI Express (PCIe) Root Complexes
Status register for a specific hardware bank (e.g., Bank 0 for Data Cache, Bank 4 for External Bus). Deciphering the MCi_STATUS Hex Codes x64 exception type 0x12 machinecheck exception link
An MCE occurs when the CPU’s identifies a fatal hardware anomaly that it cannot correct. Common triggers for this specific exception include:
Outdated system software is the single largest source of false machine check exceptions. When facing a Machine Check Exception, remember: this
The 0x12 exception code means the hardware layer found an error it cannot safely resolve on its own. The issue generally links back to one of four areas:
The error log provided a "link" to the culprit: DETAILS: Uncorrectable PCI Express error detected. PCI Segment = 0x00 . The System Bus and Inter-socket Interconnects (e
Introduced in the Pentium Pro (Intel) and K7 (AMD), the MCA provides a standardized way for processors to report hardware errors such as:
WHEA_UNCORRECTABLE_ERROR (124) A fatal hardware error has occurred. Parameter 1: Bank number (0x3) Parameter 2: MCi_STATUS = 0xfe000000000c0f35 Parameter 3: MCi_ADDR = 0x1a3f0000 **Link: UPI Link 1 - Poisoned packet**
To get the most out of the exception type 0x12, we recommend:
Many 0x12 exceptions are resolved by applying the latest microcode and firmware updates. x64 Exception type 0x12 in ProLiant DL380 Gen10 Server