This is a timeline of milestones in the history
Intel Microprocessors. Just listed are the first models, as Intel usually releases updated models with improved
clock speeds within a few years of a line's initial launch.
- i8088 - February 1978
- i8086 - June 8, 1978
- i80286 - February 1982
- i80386DX - October 17, 1985
- i80386SX - June 16, 1988
- i80486DX - April 10, 1989
- i80486SX - April 22, 1991
- Pentium Classic 60/66 MHz - March 23, 1993
- Pentium Pro (200, 180, 166, 150 MHz) - November 1, 1995
- Pentium MMX (200, 166 MHz) - January 8, 1997
- Pentium II (300, 266, 233 MHz) - May 7, 1997
- Mobile Pentium MMX (200/233 MHz) - September 8, 1997
- Mobile Pentium II (233/266 MHz) - April 2, 1998
- Celeron 266 MHz - April 15, 1998
- Pentium II Xeon 400 MHz - June 29, 1998
- Pentium III (450, 500, 550, and 600MHz) - February 26, 1999
- Pentium III Xeon 500/550 MHz - March 17, 1999
- Mobile Celeron 333 MHz - April 5, 1999
- Mobile Pentium III 400/450/500 MHz - Oct. 25, 1999
- Pentium 4 1.4/1.5 GHz - November 20, 2000