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The Am5x86 (also known as the 5x86-133, Am5x86, X5-133, and sold under various 3rd-party labels such as the Kingston Technology "Turbochip" [4]) 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.
Some of the 100 and 120 MHz parts also contain support for the 4X multiplier setting, and some of these chips may also work at 133 MHz. However, the 5x86 is not known to overclock well; 120 MHz is generally considered to be pushing the limitations of the process on which it was fabricated.
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 ...
The MediaGX was first available in speeds of 120 and 133 MHz with pricing of $79 and $99. [2] The 150 MHz version of the MedixGX was available by June of 1997. This version of the chip would be used in the Presario 2120. The 150 MHz chip would cost $99 each in bulk quantities with the 133 and 120 MHz costing $88 and $60. [3]
In 1997 a 133 MHz 5x86 AMD SBus co-processor was available. [9] The SunPCi was originally used in workstations such as the Ultra 5. The Ultra 5 workstation with an optional SunPCi for running Windows 95 or NT was announced in November 1998.
Auctor [8] / ACC Micro [9] - Maple SoC (Cx486DX4 [10] core at 100 to 133 MHz) Advantech - EVA-X4150 and EVA-X4300 (SoCs with 486SX-compatible processors at 150 MHz and 300 MHz, respectively) [11] Innovasic - pin-compatible 80186/80188 clones [12] Vadem - VG230 and VG330 (SoCs with NEC V30 CPU cores, manufacturing continued by Amphus) [13]
Cyrix released a derivative 486 processor called the 5x86, based on the Cyrix M1 core, which was clocked up to 120 MHz and was an option for 486 Socket 3 motherboards. [ 11 ] [ 12 ] AMD released a 133 MHz Am5x86 upgrade chip, which was essentially an improved 80486 with double the cache and a quad multiplier that also worked with the original ...
The 63 MHz model was launched in February 1995, and supported 25 MHz bus systems. The much faster 83 MHz version, which supported both 25 (63 MHz effective) and 33 MHz bus systems, launched much later the same year on September, and was very expensive at $299 compared to other upgrade alternatives, such as those based on AMD's 5x86 and Cyrix's ...