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Subject: Re: Some Chess benches - what's wrong?

Author: Drexel,Michael

Date: 03:34:17 08/07/04

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On August 07, 2004 at 01:31:53, Ingo Bauer wrote:

>Hello Peter
>
>>Athlon 64 3200+
>>
>>Phalanx 493909    12% faster
>>Shredder Classic 2.11 22.7% faster
>>Crafty 19.15  1115929 52 12.307692 20% slower
>>
>>PIV 3.2GHzHT
>>
>>Phalanx 441072
>>Shredder Classic 1.72
>>Crafty 19.15  1349496 43 14.884
>
>1. I have no clue about Phalanx!
>
>2. If we are talking about the "bench" command in the classic-gui the bench is
>in the gui and is not using any engine. This command is quite accurate if you
>compare AMD oder P3 like CPUs (eg it should be ok for the Centrino as well). The
>test is penelizing P4 CPUs. Your 2.11 basicly says that your CPU is 2.11 times
>faster than a 1.0GHz P3. Which is ok but the 3.2GHz P4 is faster than a 1.72GHz
>P3!
>
>3. I doubt that result of crafty. Something is wrong. Your AMD 64 is for sure
>NOT 20% slower than the P4 even in 32bit mode!
>
>To get a correct result of different CPUs is difficult. Just to get a guess.
>Take 5 Engines (e.g. Fritz, Shredder, Crafty, YACE, ProDeo (or your choise, the
>more engines you use the better!)), take the starting position. Let them
>calculate with fixed Hashsize for 1 min. Add the calculated nodes for each CPU
>and divide it by the number of programs. Then you get an average node number
>which is somehow balanced by the fact that some progs are better at P4s and some
>are better on AMD. Eg it is said that Shredder likes AMD and Fritz P4.(Maybe
>Crafty is not the best choise for this test because your AMD is for sure NOT 20%
>slower than the P4, something IS broken there!)
>
>If you want my guess for your Computer: They are very close in speed. If I have
>to bet an a winner I chose the ... P4. You know my PC and I usually compare it
>with a P4 from 3.2-3.4 GHz. SO I think yours is slightly slower than a 3.2 GHz.
>
>

No way, A64 2.2 Ghz is considerably faster than P4 3.2 Ghz for Chess.

Michael



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