Author: Vincent Diepeveen
Date: 16:36:16 01/28/02
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On January 28, 2002 at 14:08:49, Will Singleton wrote: >On January 28, 2002 at 11:50:13, Vincent Diepeveen wrote: > >>On January 28, 2002 at 11:44:00, Will Singleton wrote: >> >>>The new Mac G4's came out today, 933mhz and 1ghz versions. Question: this 2mb >>>of ddr L3 cache seems new. Is that something that would significantly affect >>>integer performance? >> >>the slow speed of the processors, 933Mhz is the bottleneck here. >> >>Also it is unknown what the penalty is for a branch misprediction. on >>paper they can do like the P4 (which runs 2.2Ghz by the way) 4 instructions >>a clock, but if branchmisprediction penalty is according to that, then >>there is no fun here. >> >>After this the L1 cache is real important. A bad L1 cache can do more harm >>to a processor than L2 cache obviously can. L2 cache is for example >>for crafty not relevant whether it's 1 MB or 2 MB (Xeon processors) >> >>After L2 cache there comes the L3 cache. >> >>So the importance of L3 cache is there of course, otherwise it would >>not exist i guess. But a bigger L3 cache will not be like 20% faster or so >>for a chessprogram. I doubt 1% even. >> > >Apparently this is a new processor with SOI, the 7455. But they say the design >tops out at max 1ghz, so really there's not much good here. Wait for the G5's, >I guess. the g5 goes to 2Ghz? by then i'll buy a 10Ghz P9 if you don't mind :) >For those who want to look at all the specs: > >http://e-www.motorola.com/webapp/sps/site/prod_summary.jsp?code=MPC7455&node >Id=03M943030450467M98653 > >Will
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