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]

The Cyrix 5x86 processor is an example of Cyrix’s strategy to design next-generation processor architectures that leverage existing designs. It is available in a 168-pin PGA or a 208-pin QFP package with standard 486 pinout.

1.1 Cyrix Cyrix公司由JerryRogers和Tom Brightman于1988年创立，最初是制造用于286和386 CPU的高速x87数学协处理器。 期间一顿操作，和前期的AMD一样，从一个小弟变成推出正面竞争的对手，后来打官司获得了 x86指令集 的授权。

586是第五代的微处理器。 九十年代中期，全面超越486的新一代586处理器问世，为了摆脱486时代处理器名称混乱的困扰，最大的CPU制造商Intel公司把自己的新一代产品命名为Pentium（奔腾）以示区别。

2.Cyrix的586级CPU 在Cyrix未正式推出其586级产品M1之前，它先推出了CX 5x86/100，这种CPU采用与486DX芯片相同的封装，采用32位数据线，可以直接插到某些486DX系统板上，但需要调整主板的跳线和采用新型的BIOS，1995年10月以后生产的486主板，多数已经能够安装这 …

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.

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.

2024年6月4日 · 一家位于中国台湾省的处理器芯片供应商，VIA Technologies（威盛公司），收购了Cyrix公司，Cyrix变成了VIA Cyrix MII处理器，VIA同样拥有自己的VIA C3处理器。 这是Cyrix公司生产的486 CPU，说它是486 CPU，是指它的效率上逼近486 CPU，却并不是严格意义上的486 CPU，这是由486 CPU的特点而定的。 486DLC CPU只是将386DX CPU与1K Cache组合在一块芯片里，没有内含浮点协微处理器，执行一条指令需要两个振荡周期。

AVT INDUSTRIAL 586 GXM-AV is a motherboard based on the Cyrix Cx5520 (GXm) chipset. Get specs, BIOS, documentation and more!

Cyrix made hybrid 486/586 CPUs (Cxrix 5x86) with Pentium core and 486 pinout. For more Information on x86 processors please refer to the x86 processor FAQ.