AMD manufactured the Am5x86 processor for ordinary PC systems until 1999. It was popular for entry-level desktop systems, appeared in many different notebook models, and also sold separately as an upgrade processor for older 486 systems.

The Cyrix 5x86 is a line of x86 microprocessors designed by Cyrix and released on June 5 of 1995. [1][2][3] Cyrix, being a fabless company, had the chips manufactured by IBM. The line came out about 5 months before the more famous Cyrix 6x86. The Cyrix 5x86 was one of the fastest CPUs ever produced for Socket 3 computer systems. [citation needed] .

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. Cyrix 6x86-P166

The Cyrix 5x86 processor architecture was engineered with power-saving intelligence to track, monitor and automatically power down the floating point unit (FPU) and other internal circuits when not in use.

The AMD Am5x86 was one of the fastest, and most universally compatible upgrade paths for users of 486 systems. Introduced in November 1995, the Am5x86 is an Enhanced Am486 processor with an internally set multiplier of 4, allowing it to run at 133 MHz on systems without official support for clock-multiplied DX2 or DX4 486 processors.

2025年3月10日 · Cyrix 5x86 (M1sc) is a 32-bit microprocessor compatible with Intel 80486. Produced in the same package as the 80486, the 5x86 included many features from M1 (Cyrix 6x86) architecture - 64-bit internal architecture, branch prediction, data forwarding and 16 KB write-back cache.

With better performance in most applications than an Intel Pentium processor at 75 MHz, the Cyrix Cx5x86 filled a gap by providing a medium-performance processor option for 486 Socket 3 motherboards (which are incapable of handling Intel's Pentium CPUs, apart …

The AMD 5x86 processor is an x86-compatible processor produced in the 1990s by AMD for use in 486-class computer systems. It was one of the fastest, and most universally-compatible upgrade paths for users of 486 systems.

Introduced in November 1995, the AMD 5x86 is a standard 486 processor with an internally-set multiplier of 4, allowing it to run at 133 MHz on systems without official support for clock-multiplied DX2 or DX4 486 processors.

The Cyrix 5x8 6 microprocessor is a high performance 586-class CPU compatible with all popular x86 oper- ating systems, including DOS, Windows, Windows NT, Windows95, UNIX, Novell, OS/2 and Solaris.