Intel Pentium

The Intel Pentium microprocessor was introduced on March 22, 1993. Its microarchitecture, dubbed P5, was Intel's fifth-generation and first superscalar IA-32 microarchitecture. As a direct extension of the 80486 architecture, it included dual integer pipelines, a faster floating-point unit, wider data bus, separate code and data caches and features for further reduced address calculation latency.

The P5 Pentium competitors included the Motorola 68060 and the PowerPC 601 as well as the SPARC, MIPS, and Alpha microprocessor families, most of which also used a superscalar in-order dual instruction pipeline configuration at some time.

The early versions of 60-100 MHz P5 Pentiums had a problem in the floating point unit that resulted in incorrect (but predictable) results from some division operations. This bug, discovered in 1994 by professor Thomas Nicely at Lynchburg College, Virginia, became known as the Pentium FDIV bug and caused embarrassment for Intel, which created an exchange program to replace the faulty processors.

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The Pentium P5 (1993)

The first Pentium microprocessor core was code-named "P5". Its product code was 80501. There were two versions, specified to operate at 60 MHz and 66 MHz respectively. This first implementation of the Pentium used a traditional 5 Volt power supply (descended from the usual TTL logic compatibility requirements). It contained 3.1 million transistors and measured 16.7 mm by 17.6 mm for an area of 293.92 mm^2. It was fabricated in a 0.8 µm BiCMOS process. The 5 volt design resulted in relatively high energy consumption for its operating frequency compared to the later models.

They also had (for the time) high heat production due to their 5 V operation, and were often known colloquially as "coffee warmers" or some similar nickname.

Intel Pentium 60 MHz

Intel Pentium 60 MHz with "PROCESSOR" printing (1). SX835. This processor has the Pentium FDIV-Bug

Intel Pentium 60 MHz without "PROCESSOR" printing (2). SX974. This processor doesn't have the Pentium FDIV-Bug

CPU-Z:

CPU die picture:

A80501-60
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80501-60
Introduction	03/22/1993
Manufacturing Date	47th week of 1993 (SX835) 6th week of 1995 (SX974)
Package	273-pin CPGA
Socket	Socket 4
Dimensions	54,9 mm x 54,9 mm
Microarchitecture	P5
Codename	P5
Manufacturing process	800 nm
Transistors	3100000
Frequency	60 MHz
Bus Speed	60 MHz
Multiplier	x1
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	15 Watt
Vcore	5 Volt

Intel Pentium 66 MHz

A80501-66
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80501-66
Introduction	03/22/93
Manufacturing Date	52nd week of 1994
Package	273-pin CPGA
Socket	Socket 4
Dimensions	54,9 mm x 54,9 mm
Microarchitecture	P5
Codename	P5
Manufacturing process	800 nm
Transistors	3100000
Instruction set	CISC
Frequency	66 MHz
Bus Speed	66 MHz
Multiplier	x1
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	16 Bit (TDP)
Vcore	5.15 Volt

The Pentium P54C (1994)

The P5 was followed by the P54C (80502); there were versions specified to operate at 75, 90, or 100 MHz using a 3.3 volt power supply. This was the first Pentium processor to operate at a 3.3 volts, reducing energy consumption. It employed an internal clock multiplier to let the internal circuitry work at a higher frequency than the external address and data buses, as it is more complicated and cumbersome to increase the external frequency, due to physical constraints. It contained 3.3 million transistors and measured 163 mm^2. It was fabricated in a BiCMOS process which has been described as both 0.5 µm and 0.6 µm due to differing definitions.

Continue reading: (see P54CS, below)

Intel Pentium 75 MHz

A80502-75 SX959 Intel Pentium 75 MHz P54C

BP80502-75 SZ994 Intel Pentium 75 MHz P54C

CPU-Z:

A80502-75
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80502-75
Introduction	10/10/1997
Manufacturing Date	31st week of 1995
Package	296-pin CPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54C
Manufacturing process	600 nm
Transistors	3200000
Frequency	CISC
Bus Speed	75 MHz
Multiplier	50 MHz
L1 Cache	x1.5
Data width	8 KB instruction cache, 8 KB data cache
Floating Point Unit (FPU)	Integrated
Power consumption	8 Watt
Vcore	3.3 Volt

BP80502-75
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80502-75
Introduction	10/10/97
Manufacturing Date	41st week of 1995
Package	296-pin CPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54C
Manufacturing process	600 nm
Transistors	3200000
Instruction set	CISC
Frequency	75 MHz
Bus Speed	50 MHz
Multiplier	x1.5
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	8 Watt
Vcore	3.3 Volt

Intel Pentium 90 MHz

A80502 Intel Pentium 90 MHz SX968 w/o Heatspreader

CPU-Z:

A80502-90
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80502-90
Introduction	03/07/94
Manufacturing Date	51st week of 1994
Package	296-pin CPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54C
Manufacturing process	600 nm
Transistors	3200000
Instruction set	CISC
Frequency	90 MHz
Bus Speed	60 MHz
Multiplier	x1.5
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	9 Watt
Vcore	3.3 Volt

Intel Pentium 100 MHz

CPU-Z:

CPU die picture:

Intel A80502-100 SX963 Die Picture by Pauli Rautakorpi - Published under the Creative Commons Attribution 3.0 Unported license. Slightly edited by HARDWARECOP.

A80502-100
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80502-100
Introduction	03/07/94
Manufacturing Date	39th week of 1995
Package	296-pin CPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54C
Manufacturing process	600 nm
Transistors	3200000
Instruction set	CISC
Frequency	100 MHz
Bus Speed	66 MHz 50 MHz
Multiplier	x1.5 x2
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	10 Watt (TDP)
Vcore	3.3 Volt

BP80502-100
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	BP80502-100
Introduction	03/07/94
Manufacturing Date	12th week of 1996
Package	296-pin CPGA
Socket	Socket 5 Socket 7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54C
Manufacturing process	600 nm
Transistors	3200000
Instruction set	CISC
Frequency	100 MHz
Bus Speed	66 MHz 50 MHz
Multiplier	x1.5 x2
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	10 Watt (TDP)
Vcore	3.3 Volt

Intel Pentium 120 MHz

CPU die picture:

Intel Pentium 120 MHz cC0 stepping (350 nm) Die Picture by Pauli Rautakorpi - Published under the Creative Commons Attribution 3.0 Unported license. Slightly edited by HARDWARECOP.

A80502120
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80502120
Introduction	03/27/95
Manufacturing Date	32nd week of 1996
Package	296-pin CPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54C, P54CQS
Manufacturing process	600 nm, 350 nm
Transistors	3200000
Instruction set	CISC
Frequency	120 MHz
Bus Speed	60 MHz
Multiplier	x2
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	13 Watt (TDP)
Vcore	3.3 Volt

The Pentium P54CS (1995)

The P54CQS was followed by the P54CS, which operated at 133, 150, 166 and 200 MHz. It contained 3.3 million transistors, measured 90 mm^2 and was fabricated in a 0.35 µm BiCMOS process with four levels of interconnect.

Intel Pentium 133 MHz

CPU-Z:

CPU die:

Intel Pentium 133 MHz (SK106) Die Picture by Pauli Rautakorpi - Published under the Creative Commons Attribution 3.0 Unported license. Slightly edited by HARDWARECOP.

A80502133
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80502133
Introduction	06/01/95
Manufacturing Date	48th week of 1995
Package	296-pin CPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54CS
Manufacturing process	350 nm
Transistors	3300000
Instruction set	CISC
Frequency	133 MHz
Bus Speed	66 MHz
Multiplier	x2
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	11 Watt
Vcore	3.3 Volt

Intel Pentium 150 MHz

CPU-Z:

A80502150
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80502150
Introduction	01/04/96
Manufacturing Date	39th week of 1997
Package	296-pin CPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54CS
Manufacturing process	350 nm
Transistors	3300000
Instruction set	CISC
Frequency	150 MHz
Bus Speed	60 MHz
Multiplier	x2.5
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	12 Watt
Vcore	3.3 Volt

Intel Pentium 166 MHz

P54CS Intel Pentium 166 MHz SY037 FV80502166

CPU-Z:

A80502166
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	A80502166
Introduction	01/04/96
Manufacturing Date	51st week of 1995
Package	296-pin CPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54CS
Manufacturing process	350 nm
Transistors	3300000
Instruction set	CISC
Frequency	166 MHz
Bus Speed	66 MHz
Multiplier	x2.5
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	15 Watt
Vcore	3.3 Volt

FV80502166
Specification Details

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Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	FV80502166
Introduction	01/04/96
Manufacturing Date	40th week of 1996
Package	296-pin PPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54CS
Manufacturing process	350 nm
Transistors	3300000
Instruction set	CISC
Frequency	166 MHz
Bus Speed	66 MHz
Multiplier	x2.5
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	15 Watt
Vcore	3.3 Volt

Intel Pentium 200 MHz

CPU-Z:

FV80502200
Specification Details

Show

Type	Central processing unit / CPU
Family	Intel Pentium
CPU part number	FV80502200
Introduction	06/10/96
Manufacturing Date	18th week of 1997
Package	296-pin PPGA
Socket	Socket 5/7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54CS
Manufacturing process	350 nm
Transistors	3300000
Instruction set	CISC
Frequency	200 MHz
Bus Speed	66 MHz
Multiplier	x3
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	16 Watt
Vcore	3.3 Volt

The Mobile Intel Pentium

Intel Mobile Pentium 120 MHz

A80502120
Specification Details

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Type	Central processing unit / CPU
Family	Intel Mobile Pentium
CPU part number	A80502120
Introduction	?
Manufacturing Date	14th week of 1997
Package	296-pin CPGA
Socket	Socket 5 Socket 7
Dimensions	49,5 mm x 49,5 mm
Microarchitecture	P5
Codename	P54C
Manufacturing process	350 nm
Transistors	3300000
Instruction set	CISC
Frequency	120 MHz
Bus Speed	60 MHz
Multiplier	x2
L1 Cache	8 KB instruction cache, 8 KB data cache
Data width	32 Bit
Floating Point Unit (FPU)	Integrated
Power consumption	7 Watt (TDP)
Vcore	2.9 Volt

This Family is complete.

Completion status:

P5: 100%
P54C: 100%
P54CS: 100%
Total: 100%

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