A80486DX2-66NV8T / AY C441750 ES T / AMD 3 VOLT (25253)

Launched in Sep. '93, the Am486 DX2-66 used a new microcode to prevent legals issues with Intel's patents, it wasn't the same as the one in earlier 486. This CPU features a clock-doubled frequency, a 8 KB Write-Back cache and come with a FPU. This CPU includes the CPUID instructions and is built with the same core as the DX2-80 and DX4-100/120 (notice the 25253)