Russell McMahon wrote: > Moore's law informally predicts that "microprocessor" processing > power will double every 18 months. (Originally it was 12 months and > related to transistors in an IC but it was extended long ago to the > currently accepted meaning.) In his 1965 paper, Moore pointed out that to keep the manufacturing cost per transistor at a minimum, the number of transistors required per chip had had to double every year... And he predicted that the trend would continue. As far as I know, that "law" is still (more-or-less) holding true. The "informal", "extended" version -- "the clock speed of the fastest Intel and AMD x86 processors that are sold to the general public for use in Windows PCs will double every 18 months" -- seems only weakly related to what Moore was talking about. To me, the surprising thing isn't that clock speeds are failing to keep up with Moore's exponential-growth model of minimum-cost transistors, but that they closely tracked his model in the first place. -Andy === Andrew Warren -- aiw@cypress.com === Principal Design Engineer === Cypress Semiconductor Corporation === === Opinions expressed above do not === necessarily represent those of === Cypress Semiconductor Corporation _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist