X64 Exception Type 0x12 Machinecheck Exception Link New!
Overview — x64 Exception Type 0x12: Machine Check Exception (MCE)
What it is
A Machine Check Exception (MCE) is a hardware-detected error reported by the CPU when it encounters a fatal condition it cannot correct. On x86_64 systems this is reported as "Exception type 0x12" (or "Type 18" / MCE). MCEs indicate hardware faults or severe platform problems and should be treated as potentially data‑corrupting and system‑stability critical.
The "x64 Exception type 0x12 - Machine Check Exception" is a critical error message typically displayed on a red screen on HPE ProLiant Gen10 servers or as a "Purple Screen of Death" (PSOD) on VMware ESXi. It indicates that the CPU has detected an unrecoverable hardware fault or a bus error. Common Causes x64 exception type 0x12 machinecheck exception link
In the microscopic world of the motherboard, the "link" between the CPU and a high-speed Fibre Channel HBA had snapped. Whether it was a bit flip the ECC couldn't handle or a total bus failure, the system had no choice but to panic. The Resolution Overview — x64 Exception Type 0x12: Machine Check
What Is Exception 0x12 (Machine Check Exception)?
On x64 (and x86) architectures, exception vector 0x12 is the Machine Check Exception (MCE).
It is a hardware-initiated exception that indicates the CPU has detected an internal hardware error (e.g., cache errors, bus errors, memory errors, or uncorrectable ECC errors). The "x64 Exception type 0x12 - Machine Check
The causes of MCEs can vary widely, including:
An x64 Exception Type 0x12 refers to a Machine Check Exception (MCE), which is a critical hardware-level error detected by the CPU's Machine Check Architecture (MCA). It indicates that the processor has encountered an unrecoverable internal error, a bus error, or an error from an external agent like memory or a PCIe device. Core Technical Details Exception Vector: 18 (decimal) or 0x12 (hexadecimal).
