Author: George Sobala
Date: 13:05:18 01/16/06
Go up one level in this thread
On January 16, 2006 at 16:04:22, Andreas Guettinger wrote: >On January 16, 2006 at 15:59:53, George Sobala wrote: > >>On January 16, 2006 at 15:51:37, Andreas Guettinger wrote: >> >>>On January 16, 2006 at 15:30:15, Ingo Bauer wrote: >>> >>>>On January 16, 2006 at 15:24:39, Andreas Guettinger wrote: >>>> >>>>>On January 16, 2006 at 14:27:57, Albert Silver wrote: >>>>> >>>>>>On January 16, 2006 at 14:02:04, George Sobala wrote: >>>>>> >>>>>>>On ICC right now: >>>>>>> >>>>>>>Rybka 1.01 Beta 10d 32-bit on a (mere) Pentium M 1.6GHz (Fishlet) >>>>>>>v >>>>>>>Deep Shredder on an Apple Quad 4x2.5GHz (Redshift) >>>>>> >>>>>>Could you give an idea as to what this might be equivalent to for a WinBox? In >>>>>>other words, would this be as fast as Deep Shredder running on an Athlon 4800+X2 >>>>>>and the like? Faster? Slower? >>>>>> >>>>>> Albert >>>>>> >>>>> >>>>>By calculation it would be equal to 7.5 Ghz of a Athlon64 or Opteron box (for >>>>>Chess), because the 2.5 Ghz PowerPC G5 is 0.75 times as fast as a Athlon64 3400 >>>>>2.4 Ghz. >>>>>I don't know what the Ghz of a Athlon 4800. It would be similar as 1 x 7.5 Ghz, >>>>>2x 3.75 or quad 1.9 Ghz for multithreading. >>>> >>>>I operated Shredder at the IPCCC in Paderborn on a Quad Mac with 2.5 GHz. We >>>>calculated that it is as fast as an Quad Opteron at 2.5 GHz (+/- 10%). A single >>>>G5 is slower than a single Opteron (for chess!) but the speedup for 4 CPUs seems >>>>to be better. The overall result is about equal. >>>> >>>>Btw: Seeing it that way a quad Mac is one of the cheapest available systems with >>>>that much "chess calculating power"! >>>> >>>>Bye >>>>Ingo >>> >>>Interesting. I only compared the NPS of single process engines and didn't take >>>in account the speedup. >>>Actually I would have thought the difference would be even bigger if a Intel >>>compiler and optimizations would be used for the Athlon/Opteron. >>>Maybe the 2 Gb of L2 Cache per CPU (4 Gb total) that is shared for 2 cores each >>>makes a difference. >>> >>>If somebody has a Athlon 4800 X2 with Deep Shredder and a testposition we could >>>make a comparision. >>> >>>regards >>>Andy >> >>The Apple Quad is certainly outstanding bang per buck. >> >>Deep Shredder x 4 runs at about 1.5 million nodes per second in midgame, >>accelerating up to about 2 million nps as the position simplifies. >> >>How does Shredder do on fast Opterons? > > >>I will turn on move kibitzing for Deep Shredder, and you can compare your >>Shredder nps as you watch. > >Comparing your to my Apple Quad would be boring. ;) > >- Andy "Your" was plural! Learn some grammar! :)
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