Author: Robert Hyatt
Date: 20:09:16 01/16/05
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On January 16, 2005 at 14:03:08, Alvaro Jose Povoa Cardoso wrote: >Hold it, hold it. It didn't happen yet! It's just an hypothesis. > >Suppose we have two systems with 1GB of DDR400: > - One Athlon64 at 10GHz with 1MB L2 cache > - One Athlon64 at 10GHz with 64MB L2 cache > >My question is: how big is the memory bottleneck in these two cases? >I guess that depends on the application being run, but suppose it's chess. >I ask this because I feel we need mre advances in the processor rather than in >the memory subsystem. >Am I wrong? > >Best regards, >Alvaro Cardoso Easy to answer. If you take 2.5ghz for todays opteron, and quadrupled the speed, the memory bottleneck would quadruple also, since memory is not getting any faster in terms of latency... The bigger cache would be a big help of course. 64x bigger to offset 4x faster clock would be a big win overall...
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