Author: Bo Persson
Date: 07:21:38 06/07/03
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On June 07, 2003 at 08:47:52, Peter Stayne wrote: >I believe I saw a thread a long time ago on the Winboard forum where Robert >Hyatt was discussing this, but I can't find it. > >Given equivalent CPU capabilities, would an engine on a machine with one of the >new 800MHz P4 QDR buses get a large or small or non-existent boost in speed over >standard DDR at say, 266MHz? or even SDRAM at 100/133? > >My 533MHz QDR operates at the same frequency as even old PC133 SDRAM memory, but >it delivers 4x as much data at each interval. Is the base frequency of the RAM >more important, or the amount of data overall? For a chess program, the access time (latency) is more important than the maximum throughput. I have 2 P4s, with different memory systems: P4 1.7 GHz, dual channel RDRAM, 2.5 GB/s stream throughput (SiSoft Sandra) P4 2.5 GHz, 533 MHz SDRAM, 1.9 GB/s throughput Guess which is the fastest for chess programs! :-) > >Pete Bo Persson bop2@telia.com
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