Author: Paul Byrne
Date: 20:20:34 12/16/04
Go up one level in this thread
On December 16, 2004 at 22:23:49, Dann Corbit wrote: >On December 16, 2004 at 20:56:56, Robert Hyatt wrote: > >>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... > >480Mbps seems pretty fast to me. >What kind of disks are you using? >;-) They lie. :) I think 480 Mpbs is the limit for usb 2.0; nothing to do with the actual speed... they mention 7 Mbps on that page. Maybe 3 ms to read a tablebase block? I looked a while back with a similar idea, the latency of those things was a millisecond or two also. So it *might* be a little faster than a hard drive, but if it is, it won't be by a huge amount... -paul
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