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Subject: Re: Amir should use the Quad 1.9 Ghz instead of the 8x 1.6 !

Author: Robert Hyatt

Date: 07:33:15 01/28/03

Go up one level in this thread


On January 28, 2003 at 09:07:35, Vincent Diepeveen wrote:

>On January 28, 2003 at 03:33:44, Mig Greengard wrote:
>
>>According to the tech I talked with, Amir and Shay were testing both machines
>>before the match to see which one they would use. To my knowledge it wasn't
>>decided until a day or two before the match. Obviously there isn't a big
>>difference in performance.
>>
>>Saludos, Mig
>>http://www.chessninja.com
>
>thanks.
>
>DIEP onto the 8 processor 1.6 would be running 16 processes and speed would
>be about expressed in K7:
>  8 x 1.6 Ghz / 1.4 = 9 Ghz


No it wouldn't.  You haven't tried an 8-way intel box yet.  It doesn't scale
nearly as well as the 2-way and 4-way intel boxes do.  The chipset for
supporting 8 cpus is simply not very good...

The 8-way box using the same clock speed for the processors will only be about
1.5X faster than the 4-way box, and that doesn't count parallel search overhead
at all.



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