Cyrix 5x86 family

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. Unlike the 5th generation x86 processors, the Cyrix 5x86 was not a superscalar processor, but it could execute integer and floating point instructions in parallel. It was possible to enable or disable advanced processor features, or even change processor's clock multiplier. With the advanced features enabled, the 5x86 processor outperformed AMD and Intel 80486 processors. The Cyrix 5x86 was produced at speeds up to 133 MHz.