Am386: A 40-MHz 386
In 1991, AMD released its 386 processor. Like its predecessors, this model was identical to the Intel versions. AMD was licensed to produce clones of Intel products, right down to the microcode (the CPU’s firmware). This processor had two notable features. First, it was faster than the Intel model—40 MHz compared to a top speed of 33 MHz at Intel—and it was the first to sport the Windows Compatible logo on the package.
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| Code name | ? |
| Date released | 1991 |
| Architecture | 32-bits |
| Data bus | 32-bits |
| Address bus | 32-bits |
| Maximum memory | 4,096 MB |
| L1 cache | no |
| L2 cache | no |
| Clock frequency | 12-40 MHz |
| FSB | same as clock frequency |
| FPU | 80387 |
| SIMD | no |
| Fabrication process | 1,500 - 1,000 nm |
| Number of transistors | 275,000 |
| Power consumption | 2 W (33 MHz) |
| Voltage | 5 V |
| Die surface area | 42 mm² |
| Connector | 132 pins |
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