Author: Bo Persson
Date: 00:08:45 06/25/03
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On June 24, 2003 at 17:32:43, Joachim Rang wrote: >On June 24, 2003 at 13:33:23, Mike Hood wrote: > >>In the article recently posted on Chessbase's site John Nunn points out that for >>applications that use a lot of integer arithmetic (like chess programs) a >>Pentium 4 is slower than a Pentium 3 at the same clock speed. This is news to >>me... can anybody please quantify this by giving in percent how much slower it >>is. Either by references to web pages or the results of your own experiments. >> >>This could help me in my next computer purchase. My finances are limited, so one >>of my options is to choose between a fast Pentium 3 and a slow Pentium 4.^ > >A Pentium 4 achieves about 70% of the performance of a P3 or Athlon with same >MHz. That's because Intel specifically designed it to run at higher clock speeds that the Athlon. You have to give up something to reach 3 GHz, like the amount of work done for each clock tick. >So the speed of a Pentium 4 with 3 GHz is equivalent to the speed of a P3 >or Athlon XP at 2.1 Ghz (Athlon 2600+). But the PIII design will never let it run at 2 GHz. It does too much work for each clock tick, if you clock it up that high it will stumble. >For chess Athlon is still the king of >the hill and much cheaper. Since a year the heat problems have also gone. So buy >an AMD or better wait a few months and by an Athlon 64 (which is according to >some posts a real beast for chess). Or take a look at the new Power Mac G5 with dual IBM 64-bit processors! :-) http://www.apple.com/powermac/ > >regards Joachim Bo Persson bop2@telia.com
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