Author: Matthew Hull
Date: 10:17:48 08/06/02
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On August 06, 2002 at 12:30:15, Mike S. wrote: >On August 06, 2002 at 10:08:00, Rex wrote: > >>Do you receive better performance upgrading from a PC133Mhz bus speed to 333Mhz >>FSB -V- keeping the PC133 FSB and upgrading CPU 300 or so Mhz? >> >>Better performance meaning Chess Programs. > >I did some Fritzmark tests with different FSB clock rates and/or* memory clock >rates, with an Athlon XP. The impact of memory clock speed has been max. 6%. >I've read from others, the impact of FSB speed & -settings can be up to (but not >more) than 10%, for chess performance. > >*) I can choose mem clock asynchronous to FSB speed, i.e. FSB 133, mem 166. > >Also, I have noticed that DDR266 (133 MHz) with *small* latency settings >provides better Fritzmarks than DDR333 (166 MHz) with *high* (longer) latency >settings. 166 MHz and small latencies were not running stable, unfortunately. > >The CPU clock speed has *much* more impact on the chess performance. The speed >increase is virtually identical to the clock rate ratio (with *very small* >differences, depending on the program, position, hash size etc.). > >Regards, >M.Scheidl I would suspect that a nice backside cache minimizes slow memory performance hits. But if you did the same test with a Duron (small backside cache), then the differences in memory speed might become more apparent. Regards, Matt
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