Author: Mike Byrne
Date: 18:39:02 03/30/03
Go up one level in this thread
On March 30, 2003 at 13:35:07, Chris Carson wrote: >On March 30, 2003 at 11:53:21, James Constance wrote: > >>1. Why is there such a difference in Nodes Per Second in Pocket PCs when >>compared with PCs? e.g. Shredder on my Athlon 1200 Mhz might do 180,000 NPS for >>a given position, whereas my StrongArm 200 Mhz does only 4,500 NPS for the same >>position. That's a factor of 40 - I was optimistically expecting it to be >>closer to the ratio in processor speeds. >> >>2. Anybody have a stab at how much this reduces the SSDF quoted rating by? >> >>cheers! > >I collected NPS for a few Pocket PC's and Palm devices and also for the SW on >PC's. The 206 seems to be about the same NPS as a 33Mhz 486 and about the same >playing strength. For a specific program (ie Ruffian or Chess Tiger), the ELO >will drop by about 70 points for each 50% reduction in NPS. So a Pocket PC >206Mhz is about 400 points weaker than an AMD 1.2Ghz. Same for the Palm. Take >a look at the SSDF list: > >http://w1.859.telia.com/~u85924109/ssdf/list.htm > >Chess Tiger 15 AMD 1.2Ghz is 2726 SSDF >Chess Tiger 14.9 Palm m515 is 2101 SSDF > >Ruffian 1.01 AMD 1.2Ghx is 2671 SSDF >Ruffian 1.04 ARM 206Mhz is 2050 aprox. > >I have played all four of the above and this is also my experience. I am rated >2150. I have also posted NPS for the four above in previous posts as well as >Chess Genius (similiar experience on both machines for CG). Thanks for the post -- I disagree with the 70point reduction for 50% less power. The inverse of that , 70 point increase for 100% increase is clearly too high. I would cut the 70 point reduction in half. Say 35 point delta for every 100% increase or 50% reduction.
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