pctechguide.com

  • Home
  • Guides
  • Tutorials
  • Articles
  • Reviews
  • Glossary
  • Contact

Pentium Architecture

The Pentium’s CISC-based architecture represented a leap forward from that of the 486. The 120MHz and above versions have over 3.3 million transistors, fabricated on a 0.35-micron process. Internally, the processor uses a 32-bit bus but externally the data bus is 64 bits wide. The external bus required a different motherboard and to support this Intel also released a special chipset for linking the Pentium to a 64-bit external cache and to the PCI bus.

The majority of Pentiums (75MHz and above) operate on 3.3v with 5v I/O protection. The Pentium has a dual pipelined superscalar design, allowing it to execute more instructions per clock cycle. There are still five stages (Prefetch, Instruction Decode, Address Generate, Execute and Write Back) in the execution of integer instructions, like that of the 486, but the Pentium has two parallel integer pipelines, enabling it to read, interpret, execute and despatch two operations simultaneously. These only handle integer calculations – a separate Floating Point Unit handles real numbers.

Pentium

The Pentium also uses two 8KB, two-way set, associative buffers (also known as primary or Level 1 cache), one for instructions and another for data. This is twice the amount of its predecessor, the 486. These caches contribute to increased performance because they act as a temporary storage place for data instructions obtained from the slower main memory.

A Branch Target Buffer (BTB) provides dynamic branch prediction. The BTB enhances instruction execution by remembering which way an instruction branched and applying the same branch the next time the instruction is used. When the BTB makes a correct prediction, performance is improved. An 80-point Floating Point Unit provides the arithmetic engine to handle real numbers. A System Management Mode (SMM) for controlling the power use of the processor and peripherals rounds out the design.

The table below shows the various incarnations of the Pentium processor from its launch in 1993 up until the introduction of the Pentium MMX:

Date Codename Transistors Fabrication (µm) Speed (MHz)
1993 P5 3,100,000 0.80 60/66
1994 P54 3,200,000 0.50 75/90/100/120
1995 P54 3,300,000 0.35 120/133
1996 P54 3,300,000 0.35 150/166/200
  • Pentium Architecture
  • Pentium Pro
  • Pentium MMX Technology
  • Pentium II
  • Pentium SEC
  • Pentium “Deschutes
  • Pentium Xeon
  • Pentium III
  • Pentium Tualatin
  • Pentium 4
  • Pentium Northwood
  • Hyper-Threading Technology
  • Pentium Prescott
  • Pentium Processor Numbers
  • Multi-Core Processors
  • Pentium Smithfield
  • Pentium D
  • Pentium Roadmap

Filed Under: Pentium CPUs

Latest Articles

IEEE 802.11b

The 802.11b group within IEEE was driven largely by Lucent Technologies and Intersil Corp., and was designed to operate in the 2.4GHz ISM (Industrial, Scientific and Medical) band. The key contribution of the 802.11b addition to the … [Read More...]

Resolutions When Sampling Digital Images with Scanners or Using Digital Cameras

Seen side by side, it's clear that the original image has been, to put it mildly, somewhat obfuscated by the sampling process. Although in our example the difference is very noticeable, the loss of definition is an inevitable part of the image sampling process, no matter how fine … [Read More...]

Inkjet Color Management

The human eye can distinguish around a million colours, the precise number depending on the individual observer and viewing conditions. Colour devices create colours in different ways, resulting in different colour gamuts. Colour can be … [Read More...]

Gaming Laptop Security Guide: Protecting Your High-End Hardware Investment in 2025

Since Jacob took over PC Tech Guide, we’ve looked at how tech intersects with personal well-being and digital safety. Gaming laptops are now … [Read More...]

20 Cool Creative Commons Photographs About the Future of AI

AI technology is starting to have a huge impact on our lives. The market value for AI is estimated to have been worth $279.22 billion in 2024 and it … [Read More...]

13 Impressive Stats on the Future of AI

AI technology is starting to become much more important in our everyday lives. Many businesses are using it as well. While he has created a lot of … [Read More...]

Graphic Designers on Reddit Share their Views of AI

There are clearly a lot of positive things about AI. However, it is not a good thing for everyone. One of the things that many people are worried … [Read More...]

Redditors Talk About the Impact of AI on Freelance Writers

AI technology has had a huge impact on our lives. A 2023 survey by Pew Research found that 56% of people use AI at least once a day or once a week. … [Read More...]

11 Most Popular Books on Perl Programming

Perl is not the most popular programming language. It has only one million users, compared to 12 million that use Python. However, it has a lot of … [Read More...]

Guides

  • Computer Communications
  • Mobile Computing
  • PC Components
  • PC Data Storage
  • PC Input-Output
  • PC Multimedia
  • Processors (CPUs)

Recent Posts

GSM Technology

The GSM network can be divided into four main parts: The Mobile Station, which is carried by the subscriber The Base … [Read More...]

Top Free Registry Cleaners

Over the last 12 years I have used all the top rated registry cleaners in the market and plenty of sub-par registry cleaners out there.  I can say … [Read More...]

Tune UP Utilities Review

PROS: Tune UP Utilities offers simple Menu options and settings. CONS: Too much power in the hands of a novice could cause more damage than … [Read More...]

[footer_backtotop]

Copyright © 2025 About | Privacy | Contact Information | Wrtie For Us | Disclaimer | Copyright License | Authors