| Maker | Processor | Register Size (bits) | Data Bus Width (bits) | Address Bus Width (bits) | Integral Cache | Math Processor | Memory Limit | Number of Transistors | Introduction Date |
|---|---|---|---|---|---|---|---|---|---|
| IBM | 80386SLC | 32 | 16 | 24 | 16K | 80387SX | 16MB | 955,000 | 10-91 |
| IBM | 80486SLC | 32 | 32 | 32 | 16K | 80487SX | 4GB | 1,349,000 | 4-91 |
| IBM | 80486SLC2 | 32 | 32 | 32 | 16K | 80486DX2 | 4GB | 1,349,000 | 6-92 |
| IBM | 80486BL2 | 32 | 32 | 32 | 16K | Built In | 4GB | 1,400,000 | 1993 |
| IBM | 80486BL3 | 32 | 32 | 32 | 16K | Built In | 4GB | 1,400,000 | 1993 |
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