"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".
This guide explores the technical nature of Exception Type 0x12, decodes its root causes, and provides step-by-step resolution pathways for both enterprise servers and consumer workstations. Understanding the Technical Anatomy of Exception 0x12
Machine Check Exceptions are fundamentally hardware-driven anomalies rather than operating system bugs. The most frequent catalysts behind a Type 0x12 crash include: x64 Exception type 0x12 in ProLiant DL380 Gen10 Server
Locate the matching timestamp for the crash. Look for supplementary entries like Bank , Status , Address , or PCI Segment . For instance, a reference to Bank 0x00000001 or Bank 0x0000000A clarifies whether the error occurred within a processor execution unit or a memory controller. 2. Deploy Full Firmware Updates
When the Machine Check Exception is the underlying cause, Windows may instead trigger on older systems, or Bug Check 0x124 (WHEA_UNCORRECTABLE_ERROR) on Windows Vista and later through the Windows Hardware Error Architecture (WHEA). x64 exception type 0x12 machinecheck exception link
Internal processor faults or cache failures.
The decoded output from tools like mcelog provides detailed information about error location and type, such as the one in the kernel's MCA decoder for AMD processors that specifically handles Family 12h errors, demonstrating the granularity possible when proper decoding tools are available.
Intel and AMD introduced MCE to implement the Machine Check Architecture (MCA) . The purpose is simple: when the CPU detects an unrecoverable hardware error (ECC memory failure, broken cache line, system bus parity error, or thermal runaway), it raises int 0x12 before the system corrupts data.
The mention of "link" in your error string is ambiguous. In the context of MCE, it usually refers to one of two things: "An uncorrectable Machine Check Exception (MCE) has occurred
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.
Check the or System Event Log (SEL) for specific bank and status codes.
: Prioritize the System ROM (BIOS), Innovation Engine, and Intel Server Platform Services (SPS). Updates here fix microcode vulnerabilities that cause unexpected reboots. 3. Adjust Power and Performance Profiles
The x64 Exception Type 0x12, or Machine Check Exception (#MC), is a critical, often fatal, hardware-level error indicating a failure in the CPU, memory, or PCIe bus. Troubleshooting typically involves updating BIOS/firmware, reverting overclocks, and reviewing system logs via HPE iLO or Windows Event Viewer. Detailed troubleshooting steps for HPE ProLiant servers are available at HPE Community . Advisory: Apollo 6500 Gen10 - HPE Support The most frequent catalysts behind a Type 0x12
If data bits flip within a memory module and the error exceeds the capabilities of standard multi-bit ECC correction, the processor triggers a fatal 0x12 halt to prevent the corruption of operating system structures. 3. Outdated or Conflicting Firmware/Microcode x64 Exception type 0x12 in ProLiant DL380 Gen10 Server
: 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
The x64 Exception type 0x12, or Machine Check Exception, can occur on a ProLiant DL380 Gen10 server. This error can indicate that: Hewlett Packard Enterprise Community