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Subject: Re: Hash Table setting Formula according to Chessbase Steve Lopez?

Author: John Rice

Date: 12:56:26 01/19/03

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On January 19, 2003 at 13:27:35, Brian Katz wrote:

>Can someone please tell me if this formula still applies to faster processors?
>As an example a 350MHz     and   3.0 gig  processors at a game with an average
>of 3 minutes (180 seconds p/move)
>Also, in using the Athlon performance numbers such as the Athlon 2600+ which is
>a 2.13 gig Processor. Which figure do you go by? The 2.13 for the Gig or the
>2600+ for the performance?
>
>The formula is 2 X processor speed X avg. seconds per move / 1000.
>
>For the 1st example:
>
>2 x 350=700
>700x180=126000
>126000/1000=126 MB Hash Tables
>
>
>For the 2nd example:
>
>2x3000=6000
>6000x180=1080000
>1080000/1000= 1080 MB Hash Tables
>
>Is this formula still a practical guide? If this is so, unless you have well
>over a 1 gig of RAM with fast processors, this formula is useless for a normal
>avg. 3 min per move tournament game.
>
>I am presently using an AMD Athlon 2600+ XP (2.13 gig) with 1 gig of RAM.
>
>It appears that trial and error is the best guide here. Not an exact science
>however.
>
>Any opinions on this would be greatly appreciated.
>
>Brian Katz

3 minutes per move average? That would make for a very long game. Anyway, I
would use the AMD performance rating number (2600) and not the actual Mhz speed.
In comparison to the P4, the model rating number is a more accurate indication
of what the AMD cpu is producing.
JR



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