Author: David Blackman
Date: 03:38:57 04/14/00
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On April 13, 2000 at 15:03:20, Lanny DiBartolomeo wrote: >In popular science (may 2000) it said that by summer 1ghz machine will be on the >shelves but that 1.5 ghz by pentium will be out not long after. Later down the >page AMDK has an expermental chip that runs at 4.5 ghz!! what do you think the >ratings of the top programs will be that monster? :) It depends what kind of chip it is. Is it a microprocessor, or is it some other kind of chip. Extremely high frequencies have been on the market for a while for simpler chips such as crossbar switches, emit an output pulse for every second input pulse chips, analog amplifiers or oscilators, and lots of other useful things that aren't actually computers. The trick is that a microprocessor is much larger and more complicated, and therefore more difficult to run fast. Even if it is a microprocessor, it may well be a very simple one, without superscalar, without out-of-order execution, with really small caches, and therefore actually slower at 4.5GHz than most chips are at 1GHz. It's been done before, and often is a useful demonstration of how to make certain parts of a chip run fast. The same tricks could turn up on production machines eventually, but scaling it all up to a full-sized modern CPU could take quite a few years.
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