Author: Robert Hyatt
Date: 18:41:58 01/23/04
Go up one level in this thread
On January 23, 2004 at 16:38:59, Yen Art Tham wrote: >On January 23, 2004 at 09:10:52, Robert Hyatt wrote: > >>On January 23, 2004 at 07:48:33, David H. McClain wrote: >> >>>On January 22, 2004 at 22:40:25, Robert Hyatt wrote: >>> >>> >>>>You were doing good until you got to the SATA drive. Throw it away and >>>>get a 15K U320 SCSI drive... >>>> >>>> >>>>>in short, neither of your choices is the fastest processing engine for chess, >>>>>but if i had to bet on one of them generically -- that is without specifying >>>>>which chess engine is to be run on it-- I may chose the AMD 3000. Would that you >>>>>meant to run Fritz8 I might change sides to the P4. >>>>> >>>>> >>>>>On January 22, 2004 at 21:30:37, Lars Berglund wrote: >>>>> >>>>>>What is the fastest processor for computerchess. >>>>>>AMD Athlon 3000+ or Pentium 4 3.0 ghz >>> >>>Dr. Hyatt, >>> >>>I don't have the means or technical know how to test other processors for >>>overall performance. When I play against other machines and they have "whisper" >>>turned on would it be logical for a layman to use their posted kn/s speed as a >>>"general" basis for speed and performance? >> >> >>Yes, so long as you are careful to compare the same program and same version >>when you look at hardware/nps numbers. Different programs are not comparable >>in terms of NPS, neither are different versions of the same program. > > >When comparing nps between a dual and single---what is the equivalent knps a >single must have to be equal in strength to a dual with let's say 700 knps? Tough question. If you assume the 1.7X efficiency I typically see for a dual (Crafty number only, no idea whatsoever about other programs except for Ferret which Bruce and I used to compare all the time with similar numbers). That would mean that if a dual searches 700K, then about 15% of them are wasted from the 1.7X speedup above, which drops the effective NPS to about 600. If your single can do 600, it will do about as well as the dual at 700.
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