Log into your server's remote management console, such as the HPE iLO Interface or Dell iDRAC.
The error message "x64 Exception type 0x12 - Machine Check Exception"
: Internal logic errors, cache failures, or communication breakdowns between the CPU and motherboard. x64 exception type 0x12 machinecheck exception link
# View recent machine checks mcelog --client
: A financial trading firm reported recurring x64 exception type 0x12 crashes on their dual-socket Intel Xeon Gold 6248 servers. The Linux mcelog showed: Log into your server's remote management console, such
Look closely at the output sections labeled WHEA_ERROR_RECORD . The debugger will output specific hex codes corresponding to the MCA banks: Global machine check status.
Check the +12V, +5V, and +3.3V rails inside diagnostic software or UEFI. Voltage drops of more than 5% under load indicate a failing or insufficient PSU. The Linux mcelog showed: Look closely at the
[ 3933.364173] mce: [Hardware Error]: CPU 4: Machine Check Exception: 5 Bank 3: be00000000200135
Use the Event Viewer . Look under Windows Logs > System for "WHEA-Logger" events. This will often provide a "Section Type" (e.g., Processor or Memory) that identifies the culprit.