Author: Vincent Diepeveen
Date: 03:33:17 06/19/04
Go up one level in this thread
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. 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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