X86-Secret : ES Zone
Am486 DX4-100 ES  (Week 31, Year 1995)   
S80486DX4-100SV8B CV / 3 VOLT ES

A special mobile version of the AMD 486 DX4 100. This engineering sample needs 3 volts to work properly and come with the new AMD microcode (SV8B). Heat dissipation is much less than the classic 486 DX4 100 for desktop.