Author: Frank E. Oldham
Date: 19:45:00 04/27/05
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On April 27, 2005 at 12:04:58, Tord Romstad wrote: >On April 27, 2005 at 11:29:07, John Sidles wrote: > >>Is this the newest "ultimate" desktop chess computer? > >Absolutely not. The G5 is a rather slow processor for chess programs, and for >integer computations in general (its strong side is floating-point operations, >which are not important for chess programs). > >My iMac G5 1.8 GHz, for instance, is clearly slower than the old Pentium IV >2.4 GHz in my office, for all the chess programs I have tried. Not even >64-bit programs like Crafty are faster on the G5. Well, for crafty, a 2GHz G5 runs at the same speed as a P4 3.2GHz/800 -- namely 1.3 MNPS, and I'd expect linear scaling with the 2.7, since bus speed is scaling to 1.35GHz. This gives an estimate of 3.4 MNPS for the dual 2.7 G5 machine. This doesn't seem too slow :-) >A dual 2.7 GHz G5 is of course much faster than a single 1.8 GHz, but it still >not >even remotely close to a dual opteron. Actually it is within about 20% of a fast dual opteron -- which isn't very remote. And of course, it's much faster than the opteron system for floating point apps, if you need them. There is some possibility that gcc4 willl also give some speedup given its new optimization architecture. Frank
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