Author: Robert Hyatt
Date: 09:42:44 08/18/00
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On August 18, 2000 at 10:54:32, Chris Carson wrote: >On August 18, 2000 at 09:21:39, Robert Hyatt wrote: > >>On August 18, 2000 at 00:16:04, Peter Kappler wrote: >> >>>On August 17, 2000 at 21:59:37, Robert Hyatt wrote: >>> >>>>On August 17, 2000 at 17:22:18, Jorge Pichard wrote: >>>> >>>>>We only know about Dr Hyatt computer since he annouces it 5 days ago. But why >>>>>Chessbase does not announces what hardwares they will be using and the same for >>>>>other with good possibility of winning such as Chess Tiger 12.9 and Shredder 5. >>>>>They need to bring the best hardware possible that can match Dr Hyatt Alpha >>>>>system, since Crafty has proven to be playing a la par with the very best >>>>>ptrograms using comparable hardwares. >>>>> >>>>>Pichard. >>>> >>>> >>>>I don't think our alpha is going to turn out to be very fast. I think we >>>>will be doing maybe 400K nodes per second. A shame, but there was little time >>>>to try to get a "real good alpha"... >>>> >>>>It will still 'play chess' of course. :) >>> >>> >>> >>>What kind of Alpha are you getting, and what would you have considered a "real >>>good alpha"?. >>> >>>--Peter >> >>The 21264A running at 667mhz or faster would be a "good alpha". The 21264 at >>500 is an "OK alpha". IE we aren't going to be hurting at all, but we could >>run probably twice as fast. > >Here are the Specint2000: > >Alpha 500 300 >Alpha 667 424 >PIII 1G 438 >Alpha 833 511 > >To bad you could not get the 833. :) > >Best Regards, >Chris Carson SPECINT doesn't tell the whole story in the case of Crafty. Alpha is doing 2x the work of the intel in the SPECINT calculations, since alpha=64 bit ints and X86=32 bits. And then there is the issue of hardware popcnt, etc, that I use a lot, but which are not even tested in SPECINT. My numbers are generally like this: For the X86, my NPS will be clock/2 roughly. For the Alpha, my NPS is roughly clock*1.5, if it is a 21264A, more like clock if a plain 21264.
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