page_title: Cyrix
section_title: Cyrix 5x86
hierarchical_section_title: Cyrix / Products / Cyrix 5x86
caption_attribution_description: English: CPU Cyrix 6x86-166+
context_page_description: Cyrix Corporation was a microprocessor developer that was founded in 1988 in Richardson, Texas, as a specialist supplier of math coprocessors for 286 and 386 microprocessors. The company was founded by Tom Brightman and Jerry Rogers. Cyrix founder, president, and CEO Jerry Rogers aggressively recruited engineers and pushed them, eventually assembling a design team of 30 people.
  Cyrix merged with National Semiconductor on November 11, 1997.
context_section_description: In 1995, with its Pentium clone not yet ready to ship, Cyrix repeated its own history and released the Cyrix Cx5x86 (M1sc), which plugged into a 3.3V 486 socket, ran at 80, 100, 120, or 133 MHz, and yielded performance comparable to that of a Pentium running at 75 MHz.  Cyrix 5x86 (M1sc) was a cost-reduced version of the flagship 6x86 (M1). Like Intel's Pentium Overdrive, the Cyrix 5x86 used a 32-bit external data bus. 
  While AMD's Am5x86 was little more than a clock-quadrupled 486 with a new name, Cyrix's 5x86 implemented some Pentium-like features.
caption: Cyrix 6x86-P166.
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