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The computer you are using to read this page uses a microprocessor to do its work. The microprocessor is the heart of any normal computer, whether it is a desktop machine, a server or a laptop .

MIPS : stands for "millions of instructions per second" and is a rough measure of the performance of a CPU. Modern CPUs can do so many different things that MIPS ratings lose a lot of their meaning, but you can get a general sense of the relative power of the CPUs from this column.

No	Date	CPU Model	Speed
1	1971 (15 November )	4004	400 KHz
2	1972 (April )	8008	500-800 KHz
3	1974 (April )	8080	2 MHz
4	1976 (March)	8085	5 MHz
5	1978 ( 8 June)	8086	10 , 8 , 5 MHz
6	1979 (June)	8088	8 , 5 MHz
7	1982 (February)	80286 80186	12 , 10 , 6 MHz
8	1985 (17 October)	80386 DX	33, 25, 20, 16 MHz
9	1988 (16 June)	80386 SX	33, 25, 20, 16 MHz
10	1989 (10 April)	80486 DX	50, 33, 25 MHz
11	1990 (15 October)	80386 SL	25 , 20 MHz
12	1991 (22 April)	80486 SX	33, 25, 20, 16 MHz
13	1992 (3 March) (9 November )	DX2 80486 SL	66 , 50 MHz 33, 25, 20 MHz
14	1993 (22 March)	Pentium	66 , 60 MHz
15	1994 (7 March) (7 March) (10 October)	DX4 Pentium Pentium	100 , 75 MHz 100 , 90 MHz 75 MHz
16	1995 (27 March) (June) (1 November)	Pentium Pentium Pentium Pro	120 MHz 133 MHz 200, 180, 166, 150 MHz
17	1996 (4 January) (10 June)	Pentium Pentium	166 , 150 MHz 200 MHz
18	1997 (8 January) (7 May) (2 June) (18 August) (8 September)	Pentium Pentium II Pentium Pentium Pro Mobile Pentium	200 , 166 MHz 300 , 200 , 233 MHz 233 MHz 200 MHz 233 , 200 MHz
19	1998 (12 January) (26 January) (2 April) (April) (15 April) (8 June) (29 June) (August) (August) (24 August) (9 September) (6 October)	Pentium Pentium II Mobile Pentium II Pentium II Celeron Celeron Pentium II Xeon Celeron Celeron Pentium II Mobile Pentium II Pentium II Xeon	266 MHz 333 MHz 266 , 233 MHz 400 , 350 MHz 266 MHz 300 MHz 400 MHz 300A MHz 333 MHz 450 MHz 300 MHz 450 MHz
20	1999 (4 January) (5 January) (7 January) (January) (25 January) (26 February) (17 March) (22 March) (5 April) (26 April) (May) (17 May) (June) (June) (14 June) (August) (2 August) (15 September) (October) (October) (25 October)	Celeron Pentium II Xeon Mobile Pentium Mobile Celeron Mobile Pentium II Pentium III Pentium III Xeon Celeron Mobile Celeron Celeron Mobile Celeron Pentium III Celeron Pentium II Pentium II Celeron Pentium III Mobile Celeron Pentium III Pentium III Pentium III Xeon	400 , 366 MHz 450 MHz 300 MHz 300 , 266 MHz 366 , 333 , 300 , 266 MHz 500 , 450 MHz 550 , 500 MHz 433 MHz 333 MHz 466 MHz 366 MHz 550 MHz 400 MHz 400 MHz (0.25-micron) 400 MHz (0.18-micron) 500 MHz 600 MHz 466 , 433 MHz 500, 450, 400 MHz 733, 700, 667, 650, 600, 550, 533, 500 MHz 733 MHz, 667 MHz, 600 MHz
21	2000 (12 January) (18 January) (14 February) (8 March) (20 March) (29 March) (10 April) (April) (24 April) (22 May) (24 May) (June) (June) (June) (19 June) (26 June) (September) (25 September) (13 November) (20 November)	Pentium III Xeon Mobile Pentium III Mobile Celeron Pentium III Pentium III Celeron Pentium III Xeon Mobile Celeron Mobile Pentium III Pentium III Xeon Pentium III Mobile Celeron Mobile Celeron Mobile Pentium III Mobile Pentium III Celeron Mobile Celeron Mobile Pentium III Celeron Pentium 4	800 MHz 650 MHz, 600 MHz 500 MHz, 450 MHz 1 GHz 866 MHz, 850 MHz 600 MHz, 566 MHz 866 MHz 550 MHz 700 MHz 700 MHz 933 MHz 650 , 600 MHz 500 MHz (Low Voltage) 750 MHz 600 MHz (Low Voltage) 700 MHz, 667MHz, 633 MHz 700 MHz 850 MHz, 800 MHz 766 MHz, 733 MHz 1.50 GHz, 1.40 GHz
22	2001(3 January) (30 January) (27 February) (19 March) (21 March) (23 April) (21 May) (29 May) (2 July) (30 July) (27 August) (30 August) (25 September) (1 October) (2 October) (13 November)	Celeron Mobile Pentiun III Mobile Celeron Mobile Pentiun III Mobile Pentiun III Mobile Pentiun III Pentium III Xeon Pentium 4 Celeron Mobile Celeron Mobile Celeron Mobile Celeron Mobile Pentiun III Mobile Pentiun III Itanium Pentium 4 Mobile Celeron Celeron Mobile Pentiun III Pentium 4 Celeron Xeon Mobile Pentiun III Celeron Pentiun III	800 MHz 500 MHz 500 MHz 700 MHz 1 GHz 750 MHz 900 MHz 1.70 GHz 850 MHz 800 MHz 600 MHz (Low Voltage) 600 MHz (Ultra Low Voltage) 750 MHz 600 MHz (Ultra Low Voltage) 800 MHz , 733 MHz 1.80 GHz , 1.60 GHz 850 MHz 900 MHz 1.13 GHz, 1.06 GHz, 1 GHz, 933 MHz, 866 MHz 2 GHz, 1.90 GHz 1.10 GHz, 1 GHz, 950 MHz 2 GHz 1.20 GHz 1.20 GHz 700 MHz (Ultra Low Voltage)
23	2002
24	2003 (14 January) (10 March) (12 March) (31 March) (14 April) (16 April) (21 May) (2 June) (11 June) (23 June) (30 June) (14 July) (8 September) (23 September) (24 September) (6 October) (3 November) (5 November) (12 November)	Mobile Celeron Mobile Celeron Mobile Celeron Mobile Pentiun III Mobile Pentiun III Mobile Pentiun 4 Xeon Xeon Pentium M Pentium M Pentium M Celeron Pentium 4 Mobile Celeron Mobile Pentiun 4 Pentium 4 Pentium M Celeron Mobile Celeron Mobile Pentiun 4 Mobile Pentiun 4 Pentium 4 Xeon Itanium 2 Xeon Itanium 2 Itanium 2 Pentium 4 M Celeron Xeon Pentium 4 Celeron Mobile Celeron	800 MHz (Ultra Low Voltage) 866 MHz (Low Voltage) 2 GHz 900 MHz (100 MHz PSB) 933 MHz (Ultra Low Voltage) - (133 MHz PSB) 2.40 GHz (400 MHz PSB) 3 GHz (400 MHz system bus) 3.06 GHz (533 MHz system bus) 1.60 GHz, 1.50 GHz, 1.40 GHz, 1.30 GHz 1.10 GHz (Low Voltage) 900 MHz (Ultra Low Voltage) 2.40 GHz, 2.30 GHz 3 GHz (800 MHz system bus) 2.20 GHz, 1.26 GHz 2.50 GHz 2.80C GHz , 2.60C GHz , 2.40C GHz 1.70 GHz , 1.20 GHz (Low Voltage) 1 GHz (Ultra Low Voltage) 2.40 GHz, 2.30 GHz, 2.20 GHz 2.40 GHz 3.06 GHz, 2.80 GHz, 2.66 GHz, 2.40 GHz 2.60 MHz 3.20 GHz 2.80 GHz (MP) 1.50 GHz 3.06 GHz (1 MB L3 Cache) 1 GHz (1.5 MB L3 Cache) 1.40 GHz (1.5 MB L3 Cache) 3.20 GHz, 3.06 GHz, 2.80 GHz 2.66 GHz (533 MHz system bus) 2.70 GHz 3.20 GHz 3.20 GHz 2.80 GHz 2.50 GHz
25	2004 (2 February) (2 March) (7 April) (13 April) (10 May) (1 June) (21 June) (23 June) (24 June)	Pentium 4 Pentium 4 Xeon Celeron Celeron M Pentium M Pentium M Itanium 2 Pentium M Celeron M Pentium 4 Pentium 4 Pentium 4 Celeron D	3.40 GHz (0.13 micron) 3.40 GHz , 3.20 GHz , 3.0 GHz , 2.80 GHz (90 nm) 3 GHz (4 MB L3 cache), 2.70 GHz, 2.20 GHz (2 MB L3 cache) 1.4 GHz 900 MHz (Ultra Low Voltage) 1.30 GHz (Low Voltage) 1.10 GHz (Ultra Low Voltage) 1.60 GHz , 1.40 GHz (with 3 MB L3 Cache) 2 GHz (755) ,1.80 GHz (745) , 1.70 GHz (735) 1.50 GHz 3.20 GHz (538) , 3.06 GHz (532) , 2.80 GHz (518) 3.60 GHz (560) , 3.40 GHz (550) , 3.20 GHz (540) , 3 GHz (530) , 2.80 GHz (518) 1.60 GHz (725) , 1.50 GHz (715) , 2.80 GHz (335) , 2.66 GHz (330) , 2.53 GHz (325) , 2.40 GHz (320) ,

Name	Date	Transistors	Microns	Clock speed	Data width	MIPS
8080	1974	6,000	6	2 MHz	8 bits	0.64
8088	1979	29,000	3	5 MHz	16 bits 8-bit bus	0.33
80286	1982	134,000	1.5	6 MHz	16 bits	1
80386	1985	275,000	1.5	16 MHz	32 bits	5
80486	1989	1,200,000	1	25 MHz	32 bits	20
Pentium	1993	3,100,000	0.8	60 MHz	32 bits 64-bit bus	100
Pentium II	1997	7,500,000	0.35	233 MHz	32 bits 64-bit bus	~300
Pentium III	1999	9,500,000	0.25	450 MHz	32 bits 64-bit bus	~510
Pentium 4	2000	42,000,000	0.18	1.5 GHz	32 bits 64-bit bus	~1,700
Pentium 4 "Prescott"	2004	125,000,000	0.09	3.6 GHz	32 bits 64-bit bus	~7,000

No	Brand	Logo
1	AMD
2	ARM
3	Freescale
4	IBM
5	Intel
6	MIPS
7	Texas Instruments
8	Transmeta