Author: Robert Hyatt
Date: 07:48:21 03/20/03
Go up one level in this thread
On March 20, 2003 at 03:38:14, Aaron Gordon wrote: >On March 20, 2003 at 02:42:54, Matt Taylor wrote: >>The latency of a memory access on Clawhammer is at -least- 40 ns (the lowest >>figure I have seen reported). I saw another figure of 70-80 ns. I am not sure >>which one is correct. On my dual-Athlon, I get 133 ns per Sciencemark. Here are >>timings I obtained for an nForce 2 board: >>http://www.talkchess.com/forums/1/message.html?290002 >> >>I do not doubt that better can be obtained. Aaron got as low as 68 ns with a 220 >>MHz bus and fast ram. > >Just for the fun of it I retested, slightly faster fsb & timings. Here's what I >came up with. AthlonXP 2.46Ghz, 223fsb, 2.5-3-3-7 timings, single-channel DDR > >Memory latencies in nanoseconds - smaller is better > (WARNING - may not be correct, check graphs) >------------------------------------------------------------------ >Host OS Mhz L1 $ L2 $ Main mem Guesses >--------- ------------- --- ---- ---- -------- ------- >p5 Linux 2.2.14- 2464 1.2200 8.1320 65.3 > > >=) The next question: will that clock speed pass a _strong_ memory diagnostic? :)
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