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Subject: Re: Question about hyperthreading ...

Author: Robert Hyatt

Date: 18:31:51 01/09/04

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On January 09, 2004 at 18:08:33, Frank Quisinsky wrote:

>Hi there,
>
>is hyperthreading for Xeon processors interesting for computerchess?
>If yes, I must buy a new OS because Windows 2000 is not compatible to
>hyperthreading.
>
>I cann't believe that with 100% engine CPU power hyperthreading give me more
>power! For sure for different other software (grafic software and so on) but for
>computer chess?
>
>Best
>Frank


If the program supports parallel search, you can expect to see your raw NPS
go up from 0% to 30%.  I have been getting 20% in the past, but I have made
some changes and have not tested recently.

If your raw NPS increases 30%, your overall search time to a specific depth
ought to drop by maybe 20% if the parallel search is reasonably efficient.



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