ALLMODELCOMPUTERNEWS: EVOLUTION OF CPU

Type/
Generation
Year
Data/
Address
bus width
Level 1 Cache
(KB)
Memory
bus speed
(MHz)
Internal
clock
speed
(MHz)

8088/
First
1979
8/20 bit
None
4.77-8
4.77-8

8086/
First
1978
16/20 bit
None
4.77-8
4.77-8

80286/
Second
1982
16/24 bit
None
6-20
6-20

80386DX/
Third
1985
32/32 bit
None
16-33
16-33

80386SX/
Third
1988
16/32 bit
8
16-33
16-33

80486DX/
Fourth
1989
32/32 bit
8
25-50
25-50

80486SX/
Fourth
1989
32/32 bit
8
25-50
25-50

80486DX2/
Fourth
1992
32/32 bit
8
25-40
50-80

80486DX4/
Fourth
1994
32/32 bit
8+8
25-40
75-120

Pentium/
Fifth
1993
64/32 bit
8+8
60-66
60-200

MMX/
Fifth
1997
64/32 bit
16+16
66
166-233

Pentium Pro/
Sixth
1995
64/32 bit
8+8
66
150-200

Pentium II/
Sixth
1997
64/32 bit
16+16
66
233-300

Pentium II/
Sixth
1998
64/32 bit
16+16
66/100
300-450

Pentium III/
Sixth
1999
64/32 bit
16+16
100
450-1.2GHz

AMD Athlon/
Seventh
1999
64/32 bit
64+64
266
500-2.2GHz

Pentium 4/
Seventh
2000
64/32 bit
12+8
400
1.4GHz-3.6GHz

AMD Athlon 64/
Eighth
2003
64/64 bit
64+64
400
2GHz-2.4GHz