Machine-check exception

A Machine Check Exception occurs when a computer processor detects an unrecoverable hardware error. Here is a list of possible causes:

• System bus errors
• Memory errors that may include parity or Error Correction Code (ECC) problems
• Cache errors in the processor or hardware
• Translation Lookaside Buffers (TLB) errors in the processor
• Other CPU-vendor specific detected hardware problems
• Vendor-specific detected hardware problems

Lease likely causes:

• Cosmic rays causing bits to randomly flip
• CPU overheating causing electrons to drift

You can decode MCEs on Linux using Dave Jone's (from Red Hat) parsemce program.

http://www.codemonkey.org.uk/cruft/parsemce.c/parsemce.c

Ultimately you should contact your hardware vendor to help you understand the significance of an MCE.