Intel Pentium

80486 ◄ Pentium ► Pentium MMX


Intel Pentium 80586 (P5) © Intel
Intel Pentium 80586 (P5) © Intel

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

CPU-Z:

SX753
SX753
Intel Pentium 60 MHz SX835 (the exact!! CPU) Die Picture by Pauli Rautakorpi - Published under the Creative Commons Attribution 3.0 Unported license. Slightly edited by HARDWARECOP.

A80501-60
Specification Details
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Intel Pentium 66 MHz

A80501-66
Specification Details
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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

CPU-Z:

SZ994
SZ994

A80502-75
Specification Details
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BP80502-75
Specification Details
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Intel Pentium 90 MHz

CPU-Z:

SX957
SX957

A80502-90
Specification Details
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Intel Pentium 100 MHz

CPU-Z:

SU099
SU099
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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BP80502-100
Specification Details
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Intel Pentium 120 MHz

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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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:

S106J
S106J

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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Intel Pentium 150 MHz

CPU-Z:

SY015
SY015

A80502150
Specification Details
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Intel Pentium 166 MHz

CPU-Z:

SY016
SY016

A80502166
Specification Details
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FV80502166
Specification Details
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Intel Pentium 200 MHz

CPU-Z:

SL24Q
SL24Q

FV80502200
Specification Details
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The Mobile Intel Pentium

Intel Mobile Pentium 120 MHz

A80502120
Specification Details
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This Family is complete.

Completion status:

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

 

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