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In computing, Machine Check Architecture (MCA) is an Intel and AMD mechanism in which the CPU reports hardware errors to the operating system.
Intel's P6 and Pentium 4 family processors, AMD's K7 and K8 family processors, as well as the Itanium architecture implement a machine check architecture that provides a mechanism for detecting and reporting hardware (machine) errors, such as: system bus errors, ECC errors, parity errors, cache errors, and translation lookaside buffer errors.[1] It consists of a set of model-specific registers (MSRs) that are used to set up machine checking and additional banks of MSRs used for recording errors that are detected.[1]
See also
- High availability (HA)
- Machine-check exception (MCE)
- Reliability, availability and serviceability (RAS)
- Windows Hardware Error Architecture (WHEA)
References
- ^ a b Intel 64 and IA-32 Architectures Software Developer's Manual Volume 3B: System Programming Guide, Part 2. Intel Corporation. September 2023. p. 16-1. Retrieved September 19, 2025.
External links
- Microsoft's article on Itanium's MCA
- Linux x86 daemon for processing of machine checks
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