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An x86-processor-based computer is any computer that has a processor that runs on Intel's 32-bit instructions* or AMD's 64-bit instructions**.

*The term "x86" refers to the 32-bit architecture that is based on Intel's 8086 processors and its derivatives and extensions (8086, 80186, 80286, 80386, 80486, Pentium ["80586"], Pentium Pro/Celeron/Core [80686]). In certain multi-architectural builds of certain programs, x86 is also called i386.

**x86_64 is an extension to x86 that supports 64-bit instructions. Initially pioneered by AMD, and later integrated into later [usually multicore] processors by Intel for cross-compatibility. In certain multi-architectural builds of certain programs, x86_64 is also called amd64 or Intel64.

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10y ago

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