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Subject: Re: 8-way Opteron machine at last available

Author: Robert Hyatt

Date: 07:42:51 08/24/04

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On August 24, 2004 at 09:06:05, Jorge Pichard wrote:

>On August 24, 2004 at 06:16:26, Vincent Lejeune wrote:
>
>>
>>A SYSTEM INTEGRATOR has started selling 5U eight way Opteron systems.
>>
>>http://www.theinquirer.net/?article=18035
>>
>>I think it's the first 8-way system since the beginning of opteron.
>>
>>Great news for computer chess where a lot of 4 way was used in tournaments since
>>1 year !
>
>
>It would had been a tough fight if shredder was using one against Hydra :-)
>
>Jorge


1.  It takes even more tuning as it is still a NUMA box.  On the 4-way and 2-way
boxes memory is local, 1 hop or 2 hops away.  This adds to that.

2.  it won't be 2x faster as nobody scales perfectly.  IE Crafty would probably
be about 1.7X faster, more or less depending on lots of things.  That is not
enough to make up for the apparent difference in playing strength between
Shredder and Hydra.  IE Hydra appears to be 200+ points stronger based on a
final result of 6-2.  1.7X faster won't get 200 points for Shredder...

These machines are not bad.  There are _several_ companies with 8-way boxes
ready to go.  I ran on one at least 6 months ago.  AMD has had one in their
development lab since well before the last CCT event...




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