Ensure all Intel XMP (Extreme Memory Profile) or AMD EXPO profiles are disabled, forcing the system RAM to run at standard JEDEC baseline frequencies. Disable any automatic motherboard AI overclocking features. 2. Isolate Thermals and Environmental Stress
The most common resolution is updating the system firmware. For HPE servers, this involves downloading the latest . Ensure all firmware components (BIOS, ILO, NICs) are updated to the latest versions. 2. Switch from Legacy to UEFI Boot Mode
References: Intel SDM Vol. 3 (Chapter 15 – Machine-Check Architecture), AMD APM Vol. 2 (Section 8.2 – Machine Check Exception), Linux kernel documentation on MCA (Documentation/x86/x86_64/machinecheck.rst). x64 exception type 0x12 machinecheck exception link
In the Intel and AMD x64 Machine Check Architecture (MCA), exception vector 18 (which translates to hexadecimal ) is reserved explicitly for the Machine Check Exception ( #MC ).
If you are using a server (e.g., HPE ProLiant), check the Integrated Management Log (IML) via iLO (Integrated Lights-Out) to find the specific component failure. Ensure all Intel XMP (Extreme Memory Profile) or
Understanding and Troubleshooting x64 Exception Type 0x12: Machine Check Exception
: Micro-cracks in motherboard traces, failing power supply units (PSUs), or poor heatsink contact causing thermal spikes will trigger the #MC safety net. Step-by-Step Diagnostics and Troubleshooting Isolate Thermals and Environmental Stress The most common
: Faulty I/O controllers or external PCI cards sending "Fatal Bus Error" signals.
The symptoms of a Machine Check Exception can be severe and often result in:
Memory errors, particularly if Error Correction Code (ECC) cannot correct the bit flips.
indicates a critical, unrecoverable hardware failure detected by the processor. Hewlett Packard Enterprise Community In the x86-64 (x64) architecture, is the hexadecimal representation of decimal , which is the specific interrupt vector reserved for a Machine Check Exception (#MC) Common Causes