Virtual Microscopy
Microscopy Primer
License Info
Image Use
Custom Photos
Site Info
Contact Us

Visit Science,
Optics, & You

The Galleries:

Photo Gallery
Silicon Zoo
Chip Shots
DNA Gallery
Amino Acids
Religion Collection
Cocktail Collection
Screen Savers
Win Wallpaper
Mac Wallpaper
Movie Gallery

AMD Integrated Circuits

486DX4 100MHz Microprocessor

The digital image presented below reveals surface details present on an AMD 486DX4 100MHz microprocessor die (representing the complete integrated circuit). Busses, registers, and memory cache units were highlighted using oblique illumination with red and blue filters coupled to fiber optics light pipes and a tungsten-halogen source.

The 100 megahertz version of the AMD 486DX4 is a 32-bit microprocessor, which features an internal processor clock speed that is three times the external 33-megahertz speed of the memory bus and the motherboard. Note that, despite the name, the DX4 does not run at four times the memory bus speed. The DX3 was an internal Intel designation for a 2.5X clock multiplier designed to operate within the 486 microprocessor line, which was developed past the prototype versions, but never shipped. Eventually, AMD released the 5x86, a clock quadrupled version, which rivaled the performance of the early Intel Pentiums.


Questions or comments? Send us an email.
© 1995-2019 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Friday, Nov 13, 2015 at 02:18 PM
Access Count Since November 1, 1996: 63135
Microscopes provided exclusively by: