What (Windows, Linux, ESXi) experienced the crash?
This is the most critical diagnostic step. Monitor system temperatures using a tool like HWMonitor (Windows) or sensors (Linux). If your CPU temperature exceeds its maximum junction temperature (often listed as "Tj. Max" or 90-100°C for many modern CPUs) under load, your cooling solution may be failing. Test your Power Supply . If you have a multimeter, you can test the voltages on the PSU connectors (checking for stable 12V, 5V, and 3.3V lines). The easiest method, however, is to install a known-good, high-quality spare PSU and see if the crashes stop. x64 exception type 0x12 machinecheck exception link
Problems with communication between the processor and the motherboard or uncorrectable PCI Express (PCIe) errors. What (Windows, Linux, ESXi) experienced the crash
While the CPU raises the exception, the root cause could be memory, PCIe, power supply, or even a bad driver causing illegal bus transactions. If your CPU temperature exceeds its maximum junction
Comprehensive Guide to Fixing the "x64 Exception Type 0x12: Machine Check Exception" Error
: He synchronized the server component firmware using the latest Service Pack for ProLiant (SPP) .