Feb
18
| Chip | Year Added | Data Bus Width | Address Bus Width | Speed(MHz) |
|---|---|---|---|---|
| 8080 | 1974 | 8 | 8 | 2 |
| 8086 | 1978 | 16 | 20 | 5~10 |
| 8088 | 1979 | 8 | 20 | 4.77 |
| 80286 | 1982 | 16 | 24 | 8~12 |
| 386DX | 1985 | 32 | 32 | 16-33 |
| 386SX | 1988 | 32 | 24 | 16-20 |
| 486DX | 1989 | 32 | 32 | 25-50 |
| 486SX | 1991 | 32 | 32 | 16-33 |
| 487SX | 1991 | 32 | 32 | 16-33 |
| 486DX2 | 1991 | 32 | 32 | 22-66 |
| 486DX4 | 1992 | 32 | 32 | 75-100 |
| Pentium | 1993 | 32 | 32 | 60-166 |
| Pentium Pro | 1995 | 64 | 32 | 150-200 |
| Pentium II | 1997 | 64 | 64 | 233-300 |
| Pentium II Xeon | 1998 | 64 | 64 | 400-600 |
| Celeron | 1999 | 64 | 64 | 400-600 |
| Pentium III | 1999 | 64 | 64 | 350-1000 |
| Pentium III Xeon | 1999 | 64 | 64 | 350-1000 |
| Pentium 4 | 2002 | 64 | 64 | 1000-3000 |
