April 1972
Name of Processor: 8008
Clock speed: 200 kilohertz
Number of transistors: 3,500
December 1974
Name of Processor: 8080
Clock speed: 2 MHz
Number of transistors: 6,000
August 1976
Name of Processor: 8085
Clock speed: 5 MHz
Number of transistors: 6,500
September 1978
Name of Processor: 8086
Clock speed: 10 MHz
Number of transistors: 29,000
February 1982
Name of Processor: 286
Clock speed: 12 MHz
Number of transistors: 134,000
October 1985
Name of Processor: 386
Clock speed: 16 MHz
Number of transistors: 275,000
February 1987
Name of Processor: 386
Clock speed: 20 MHz
Number of transistors: 275,000
April 1989
Name of Processor: 486
Clock speed: 25 MHz
Number of transistors: 1,200,000
June 1991
Name of Processor: 486
Clock speed: 50 MHz
Number of transistors: 1,200,000
March 1993
Name of Processor: Pentium
Clock speed: 60 MHz
Number of transistors: 3.1 million
March 1994
Name of Processor: Pentium
Clock speed: 75 MHz
Number of transistors: 3.2 million
March 1995
Name of Processor: Pentium
Clock speed: 120 MHz
Number of transistors: 3.2 million
June 1995
Name of Processor: Pentium
Clock speed: 133 MHz
Number of transistors: 3.3 million
January 1996
Name of Processor: Pentium
Clock speed: 166 MHz
Number of transistors: 3.3 million
June 1996
Name of Processor: Pentium
Clock speed: 200 MHz
Number of transistors: 3.3 million
May 1997
Name of Processor: Pentium II
Clock speed: 300 MHz
Number of transistors: 3.3 million
April 1998
Name of Processor: Pentium II
Clock speed: 400 MHz
Number of transistors: 7.5 million
August 1998
Name of Processor: Pentium II
Clock speed: 450 MHz
Number of transistors: 7.5 million
August 1999
Name of Processor: Pentium III
Clock speed: 600 MHz
Number of transistors: 9.5 million
October 1999
Name of Processor: Pentium III
Clock speed: 733 MHz
Number of transistors: 28 million
January 2000
Name of Processor: Pentium III
Clock speed: 800 MHz
Number of transistors: 28 million
March 2000
Name of Processor: Pentium III
Clock speed: 1.0 GHz
Number of transistors: 28 million
November 2000
Name of Processor: Pentium 4
Clock speed: 1.5 GHz
Number of transistors: 42 million
April 2001
Name of Processor: Pentium 4
Clock speed: 1.7 GHz
Number of transistors: 42 million
Aug 2001
Name of Processor: Pentium 4
Clock speed: 2 GHz
Number of transistors: 42 million
Jan 2002
Name of Processor: Pentium 4
Clock speed: 2.2 GHz
Number of transistors: 42 million
Jun 2002
Name of Processor: Pentium 4
Clock speed: 2.53 GHz
Number of transistors: 55 million
Aug 2002
Name of Processor: Pentium 4
Clock speed: 2.8 GHz
Number of transistors: 55 million
Nov 2002
Name of Processor: Pentium 4
Clock speed: 3.0 GHz
Number of transistors: 55 million
Jun 2003
Name of Processor: Pentium 4
Clock speed: 3.2 GHz
Number of transistors: 55 million
Feb 2004
Name of Processor: Pentium 4
Clock speed: 3.4 GHz
Number of transistors: 55 million
