Author: Aaron Gordon
Date: 00:38:14 03/20/03
Go up one level in this thread
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
=)
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