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Difference between Pentium and Pentium Pro Microprocessor:

The difference between Pentium and Pentium Pro Microprocessor is given in table below

Pentium Processor

Pentium-Pro Processor

The Pentium processor is the fifth-generation processor 80586 and it is represented by P5. This processor was developed in 1993 by Intel. The Pentium-Pro processor is the sixth-generation processor and it is represented by the P6 family processors. This processor was developed in 1995 by Intel.
This is a 5 V processor and it was fabricated in 0.8-micron BiCMOS technology Pentium-Pro processor core operates at 3.1 V to 3.3 V and it is fabricated in a 0.6 μm BiCMOS process.
Pentium runs at a clock frequency of 60 MHz or 66 MHz. The Pentium-Pro processor’s clock speeds are 150, 166, 180 or 200 MHz with a 60 or 66 MHz external bus clock.
Pentium has 3.1 million transistors. Pentium-Pro consists of 5.5 million transistors.
Pentium has 2 x 8 Kbyte L1 cache, but there is no L2 cache. Pentium-Pro has 2 x 8 Kbyte L1 cache, and a 256 Kbyte L2 cache.
Pentium has a 32-bit address bus. Pentium-Pro has a 36-bit address bus.
It has two instruction units. It has six instruction units.
It has superscalar pipeline. It has two independent integer pipelines and a floating point pipeline. The Pentium-Pro has a 12-stage decoupled super pipeline architecture which uses an instruction pool. It has speculative execution through register renaming with 40 registers.