Author: Robert Hyatt
Date: 08:34:28 08/15/05
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On August 15, 2005 at 11:27:53, Djordje Vidanovic wrote: >You can safely assume that the following rule is valid: > >P4 x .6 = AMD64 Ghz > >examples: P4 @ 3 Ghz = AMD64 @ 1.8 Ghz, or P4 @ 2.4 Ghz = AMD64 @ 1.44 Ghz > >Regarding the 2.4 Ghz AMD64 that you plan to buy, it would turn out that only a >(non-existant as yet) P4 running at 4 Ghz would meet the equation. > >Simply put, an AMD64 2.4 Ghz is as fast for chess as a P4 @ 4Ghz, and quite >often it is as fast as a dual Xeon 2.4 (most notably running Shredder 9). > >All this holds true for 32 bit systems, but a 64 bit OS would lead to Hyatt's >idea that a single AMD64 would be almost twice as fast as a 2.8 dual Xeon. > > >I hope that this detailed information will help you to decide which way to go. > >Djordje Your comparison is slightly broken. AMD = 64 bits, PIV is not. In the case of Crafty, this changes things so that a 2.2ghz opteron is over 2.1x faster than a 2.8ghz PIV xeon (with 1mb L2 to boot on the intel)).
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