Author: Uri Blass
Date: 07:37:25 05/26/05
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On May 26, 2005 at 10:24:49, Günther Simon wrote: >On May 26, 2005 at 07:11:26, Steve Glanzfeld wrote: > >>On May 26, 2005 at 05:03:01, Robert Hollay wrote: >> >>>Just out of curiosity: how much stronger would be Rebel on a today's top PC >>>then it was on those 1998's one? >> >>As a very rough estimation, you can calculate the speed doublings for typical >>CPUs (for example: 500 MHz -> 1 GHz -> 2 GHz are 2 doublings), and multiply with >>30...50 Elo. It is not clear which value is more near to the truth, against >>humans. Among comps, even values up to +80 Elo for twice the comp speed have >>been used with good correlation. Against humans, more speed has less impact. >> >>Of course, that means the performance gain with exactly the same software >>version on faster hardware. >> >>Hardware experts will be able to explain that a modern 2 GHZ CPU is more than 4 >>times faster than a 500 MHz P3, but that's why I write "very rough estimation." >>That uncertainty is unimportant because we have to guessimate :-) the Elo gain >>per doubling, anyway... > >I just want to add that it is vice versa, at least for PIII to PIV machines. >A PIV 2Ghz e.g. is much less than 4 times faster than a PIII 500Mhz(in kn/s). >I don't remember though, why the PIII has a relative advantage... >(Here, I could figure out e.g. that a PIII 650 is just ~ 3.3 times slower >than a PIV 2.66 Ghz instead of the expected 4.1 times (if linear) - of course >both machines are well tuned and configured). > >Guenther The question was "how much stronger would be Rebel on a today's top PC"? PIV is not one of today's top PC so it is not relevant. If you compare A3000(that is 2000Mhz) with PIII 500 mhz you will find that the A3000 is clearly more than 4 times faster. I found that My A3000(2000 mhz) 3 times faster than A1000(1000 mhz) for Movei inspite of the fact that you could expect it to be only twice faster based on the mhz. Uri
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