Author: Eugene Nalimov
Date: 10:20:40 06/17/04
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On June 17, 2004 at 06:55:18, Vincent Diepeveen wrote: >[...] > >Please list the processors in order of L2 cache speed and you'll realize that >speed still is of overwhelming importance. List them at random access speed for >L2 cache (some processors are faster in streaming than random access in their >caches like P4). > >Basically opteron has fastest L2 cache which can deliver each 13 cycles data (4 >reads simultaneously even if i understand well). No other processor can deliver >data from L2 cache that fast. Intel Itanium 2 Processor Reference Manual For Software Development and Optimization, Table 6-4 "Cache Summary": Itanium2 cache latency: L1: 1 cycle, 4 loads/cycle L2: 5 cycles (integer loads), 4 loads/cycle L3: 12/14 cycles, depending on cache size (integer loads), 1 load/cycle Thanks, Eugene >So clock speed still is of overwhelming importance. > >>A PM 1.4 laptop seems to have about the same speed as an AMD2600+, with 1 big >>difference. Whereas my AMD does it's helicopter imitation, I can't even hear the >>fan of the PM. >> >>I let it run my chessprogram for a few hours at my desk, and the fan never >>started to make a noise. My p4 laptop (also Dell) uses its fan about 50% of the >>time (running office applications, no chessprograms) >> >>Tony >> >>> >>>Sincerely, >>>Joshua Shriver >>> >>>On June 15, 2004 at 04:17:09, Gian-Carlo Pascutto wrote: >>> >>>>On June 14, 2004 at 21:07:03, David Mitchell wrote: >>>> >>>>>2) Xeon >>>> >>>>>4) Centrino >>>> >>>>Centrino should easily outperform Xeon clock for clock. >>>> >>>>For some programs it will even outperform an Opteron clock for clock >>>>in 32 bit mode. >>>> >>>>-- >>>>GCP
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