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Subject: Re: 64 bit --and chess of course

Author: Robert Hyatt

Date: 17:56:56 12/16/04

Go up one level in this thread


On December 16, 2004 at 18:25:42, Vincent Lejeune wrote:

>On December 16, 2004 at 17:31:10, Scott Gasch wrote:
>
>>On December 16, 2004 at 14:46:33, Dann Corbit wrote:
>>
>>>On December 16, 2004 at 03:37:46, Gian-Carlo Pascutto wrote:
>>>
>>>>On December 15, 2004 at 22:24:49, Alex  wrote:
>>>>
>>>>>Of course it would be foolish to buy a New computer now......  Micrsoft is going
>>>>>to present a 64 bit OS nest year, the Christmas prices of new computers will
>>>>>drop like a BRICK by Jan 1..........  But ! Let us speculate.... Hmmmmmmmmmm
>>>>>What will 64 bit DO for chesss programs ....Yes yes I KNOW AMD has New processor
>>>>>that does 64 bit..... but what is the difference ..reallY?  D
>>>>
>>>>Speed.
>>>>
>>>>You can expect programs to get 10-60% faster from 64 bit mode.
>>>>
>>>>This is in addition to the Athlon64 already being so fast in 32 bit mode.
>>>
>>>Another potential advantage is the large address space.
>>>
>>>With terabytes of ram directly addressable, potentially totally new solution
>>>ideas may be formulated.
>>>
>>>For instance, you could memory map the 3-4-5 man tablebase files and lose the
>>>disk access penalty.  That might make them give a large Elo boost, while the
>>>disk access method for 32 bit systems seems to be about break even.
>>>
>>>You could have 20 GB hash tables.
>>>
>>>You could store (in ram) a large tree of every chess game ever played together
>>>with statistical information on each node.
>>
>>...of course this all assumes you have a machine with 20Gb of physical memory
>>and a chipset that supports that much RAM.  Until the cost of memory comes way
>>down, you won't see me mapping EGTB files (compressed or not) into memory. :)
>>
>>Scott
>
>I'd suggest 2 pen drive USB like this :
>http://www.supermediastore.com/pendrive-4gb-flash-drive.html
>
>Yes, no that cheap, but all 3-4-5 egtb way faster than disk


"faster than disk"?  What kind of disk do you use for your egtb's?  Floppy or
CDRom?  :)  The think you gave a link to is horribly slow compared to anything
except for CD/floppy drives...



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