World Library  
Flag as Inappropriate
Email this Article

Intel DX4

Article Id: WHEBN0000015261
Reproduction Date:

Title: Intel DX4  
Author: World Heritage Encyclopedia
Language: English
Subject: List of Intel Pentium Pro microprocessors, Intel 80486 OverDrive, Intel X79, Intel 8086, Intel 4040
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Intel DX4

Intel DX4 100MHz
Voltage converter for DX4 processors (5V to 3,3V)
An IntelDX4 FC80486DX4-75 SX883 75MHz (3 x 25MHz) 16kB Cache L1 WT. It was made in January 1995, and was removed from a Toshiba laptop.

The IntelDX4 is a clock-tripled i486 microprocessor with 16 kB L1 cache. Intel named it DX4 (rather than DX3) as a consequence of litigation with AMD over trademarks. The product was officially named the IntelDX4, but OEMs continued using the i486 naming convention.

Intel produced IntelDX4s with two clock speed steppings: A 75 MHz version (3× 25 MHz multiplier), and a 100 MHz version (usually 3× 33.3 MHz, but sometimes also 2× 50 MHz). Both chips were released in March 1994. A version of the IntelDX4 featuring write-back cache was released in October 1994. The original write-through versions of the chip are marked with a laser embossed "&E", while the write-back enabled versions are marked "&EW". i486 OverDrive editions of the IntelDX4 had locked multipliers, and therefore can only run at 3× the external clock-speed. The 100 MHz model of the processor had an iCOMP rating of 435, while the 75 MHz processor had a rating of 319. The IntelDX4 was an OEM-only product, but the DX4 Overdrive could be purchased at a retail store.

The IntelDX4 microprocessor is mostly pin-compatible with the 80486, but requires a lower 3.3V supply. Normal 80486 and DX2 processors use a 5V supply; plugging a DX4 into an unmodified socket will destroy it. Motherboards lacking support for the 3.3V CPUs can sometimes make use of them using a voltage regulator (VRM) that fits between the socket and the CPU.

S-Specs

Processor Speed (MHz) Input Clock (MHz) Voltage Center (V) Voltage Range (V) Part Number Clock Multiplier S-Spec Number
75 25 X 3 3.3 3.1 - 3.6 FC80486DX4-75 3X mode only SK052, SX883
100 33 X 3 3.3, 3.45 3.1 - 3.6 FC80486DX4-100 3X mode only SX906
100 33 X 3 / 50 X 2 3.45 3.3 - 3.6 FC80486DX4-100 3X or 2X mode SX876
100 33 X 3 / 50 X 2 3.3, 3.45 3.1 - 3.6 FC80486DX4-100 3X or 2X mode SK053
75 25 X 3 3.3 3.1 - 3.6 A80486DX4-75 3X mode only SK047, SX884
100 33 X 3 3.45 3.3 - 3.6 A80486DX4-100 3X mode only SK051, SX900
100 33 X 3 / 50 X 2 3.45 3.3 - 3.6 A80486DX4-100 3X or 2X mode SX877
100 33 X 3 / 50 X 2 3.3 3.1 - 3.6 A80486DX4-100 3X or 2X mode SK050
100 33 X 3 3.45 3.3 - 3.6 A80486DX4WB-100 3X mode only SK096
100 33 X 3 / 50 X 2 3.3 3.1 - 3.6 A80486DX4WB-100 3X or 2X mode Limited availability
75 25 X 3 3.3 3.1 - 3.5 A80486DX4WB-75 3X mode only SK102
100 33 X 3 / 50 X 2 3.3 3.1 - 3.6 FC80486DX4WB-100 3X or 2X mode SK099
75 25 X 3 3.3 3.1 - 3.5 FC80486DX4WB-75 3X mode only SK100

References

External links

  • http://www.olympusmicro.com/micd/galleries/chips/pages/intel486dx4a.html — photomicrograph of a DX4 microprocessor
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.