Author: stuart taylor
Date: 12:23:48 05/18/05
Go up one level in this thread
On May 18, 2005 at 11:38:48, Robert Hyatt wrote: >On May 18, 2005 at 06:31:23, stuart taylor wrote: > >>On May 18, 2005 at 00:04:32, Robert Hyatt wrote: >> >>>On May 17, 2005 at 20:14:56, Ryan B. wrote: >>> >>>>On May 17, 2005 at 19:58:35, stuart taylor wrote: >>>> >>>>> 1). What exactly is the implications of RPM in hard disks? >>>>>a). in comparing 42000 rpm to 72000 rpm, >>>>In chess none >>> >>>Makes a +huge+ difference if you use endgame tables. >>> >>>From someone that does this. :) >> >>But would the difference between 4200 rpm and 7200 rpm be huge? >> >>S.Taylor >>> > >4200 rpm is 14 ms per revolution, or 7ms average rotational latency. 7200 rpm >is 8ms per revolution, or 4ms average rotational latency. Every random disk I/O >will save 3ms with the 7200 RPM drive. It will be very noticable for endgame >probes. Thanks Bob, for this further clarification! I never really learned the basics, although I ought to have done by now. I just try to fit things together in my mind like a jigsaw puzzle. I'm sure it wouldn't take more than 5-6 hours to get a very useful amount of basic knoledge in my head, if someone was explaining to me extremely clearly. However, I never knew that endgame bases take much time to access anyway, so I'm not sure how the lack of being less than a half slower would be that bad. 4200 as opposed to 7200. I have been aware that when things reach the advanced endgame, some programs move instantly, every time. So that seemed quite quick, even with some of the programs (and hardware) from over 15 years ago. S.Taylor > > > > >>> >>> >>>> >>>>> >>>>>b).what difference does this make to speed of computer functions, and which >>>>>computer functions does it affect? >>>>> >>>>will affect read/write speed. For chess this should not mater. >>> >>>RPM doesn't really affect bandwidth. In fact, the fastest spinners actually >>>have lower sustained bandwidth because clocking the bits becomes a problem. As >>>a secondary issue, the fastest disks are not the best capacity drives, for the >>>same reason. Best SCSI drives for capacity today are the 7200 and under >>>drives... >>> >>> >>> >>> >>>> >>>>>c).Does the new 915 chipset make the rpm slower? (I read that they make >>>>>something a little slower, but I couldn't understand exactly what, and if it >>>>>causes any handicap). >>>>> >>>>I really doubt it. >>>> >>>>>d).One computer salesman told me over the phone that it represents the weakness >>>>>or strength of the computer. Does he know what he's talking about? >>>>> >>>>no >>>> >>>>>2).What is the difference between the proccessors from Intel Pentium Mobile >>>>>technology, if it is 730, 735, 740 till about 770 etc? >>>>> >>>>speed >>>> >>>>>Thanks for any answers, information or opinions. >>>>> >>>> >>>>>S.Taylor >>>> >>>> >>>>The Pentium M is a very fast cpu and good for chess however for engines that hit >>>>the hash table a lot the slower RAM access of a laptop may slow things down a >>>>bit. Might try turning off ETC if it is an option in your favorit chess program >>>>when playing on a laptop.
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