Author: Aaron Gordon
Date: 15:45:33 06/19/04
Go up one level in this thread
On June 19, 2004 at 06:33:17, Vincent Diepeveen wrote: >On June 18, 2004 at 08:51:34, Aaron Gordon wrote: > >>On June 18, 2004 at 06:39:17, Vincent Diepeveen wrote: >> >>>On June 17, 2004 at 21:39:26, Aaron Gordon wrote: >>> >>>You asked for example : >>> >>>Why filling all banks of a P4C/P4EE cas2 is helping a lot for DIEP you can read >>>at www.aceshardware.com, hardware reviews from the different processors and >>>comparing them against each other. >>> >>>The speedups reported by Johan thanks to SMT/HT only could get reproduced by >>>testers with all memory banks filled. If you fill 1 bank only, you don't get >>>like 21% speedup out of HT at all. >>> >>>See www.aceshardware.com >> >>Looks like he agrees with me: > >>His quote: "No surprises here, as DIEP is more or less immune to faster memory >>subsystems." >> >>Link to page: >>http://www.aceshardware.com/read.jsp?id=65000313 >> >>If you notice in the benchmarks, DIEP speeds up 1kn/s (148 to 149) going to >>lower latency non-registered / non-ecc memory on the same CPU. Now double memory > >I said something about: > cas2 versus cas3 > >I said something about filling all memory banks. > >Now you say here registered CAS2 memory filling all slots is not so bad? > >Why am i not amazed? > >You are not contradicting *anything* i said so far. I've told you time and time again that filling banks of ram does nothing to a chess programs performance vs 1 bank. Zzzz? >All the memory used has CAS2 timings (yes especially the registered memory his >machines have, the manufacturers *really* optimize it well). > >All banks are filled. > >So that proves my point. > >>bandwidth, you'll notice no difference. Only difference I've seen is from > >Again and again. Bandwidth is *not* important. > >Just random access latency is. > >If you want to calculate a random access bandwidth from that... ...fine with >me... > >>decreasing memory/bus latency. Even then it is EXTREMELY small and one could say >>it is within margin of error. > >In case you didn't notice... ...the mainboards are also different...
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