Author: Robert Hyatt
Date: 08:38:48 05/18/05
Go up one level in this thread
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. >> >> >>> >>>> >>>>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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