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| Thread ID: 113264 | 2010-10-12 03:29:00 | Inconcistency in memory latency benchmark | Sheena (16025) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 1143898 | 2010-10-12 03:29:00 | Hi all. I tested my pc memory latency with sisoft sandra and i got some weird results. In fact i get 2 types of results, each one being really consistent though. 1st type (Right results for my pc) Memory latency : 69ns L2 cache latency : 18 clocks 2nd type ("high latency" benchmark) Memory latency : 79ns L2 cache latency : 21 clocks It's pretty much random. I can test and get the 1st type then i retest 15 mins later and i get the 2nd type. Nothing else is running on my computer when i test (cpu usage at 0%). Now my question is if it's something normal with sisoft sandra or something may be wrong with my computer ? My PC : Core 2 Duo E8400 @ 3.6ghz (400x9) 4GB Kingston HyperX DDR2-1066 5-5-5-18-2T Windows XP SP3 P.S. Sorry english is not my native language :P |
Sheena (16025) | ||
| 1143899 | 2010-10-12 04:55:00 | Do you have any software installed (or even enabled in bios) that manages clock speeds automatically? | SoniKalien (792) | ||
| 1143900 | 2010-10-12 05:04:00 | Do you have any software installed (or even enabled in bios) that manages clock speeds automatically? Nah i though it was that at first but i disabled EIST function and C1/C2 state in the bios so the cpu run at 3 . 6ghz idle . Still i get these weird variations . I even noticed the 2 cores don't even benchmark the same . Last test : Core 0 : Memory latency 79ns , L2 cache latency 21 clocks Core 1 : Memory latency 69ns , L2 cache latency 18 clocks This is very strange heh . |
Sheena (16025) | ||
| 1143901 | 2010-10-12 05:35:00 | Um, yea lol. Try benchmarking with Everest see if you get the same results :) | SoniKalien (792) | ||
| 1143902 | 2010-10-12 05:48:00 | Disable speedstep too if the CPU supports it | Speedy Gonzales (78) | ||
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