2008/6/1 Paolo <[EMAIL PROTECTED]>: > On Sun, Jun 01, 2008 at 09:41:35AM +0300, Dotan Cohen wrote: >> What could explain the differences between these reported temperatures? > >> coretemp-isa-0000 > ... > > 2 degC betwwen cores doesn't sound too much, also considering param spread > etc.
The 2 degree difference between core0 and core1 isn't what confused me, rather, the different tempuratures reported by acpi, sensors, and the /proc file. > The ACPI value comes from other module - might be an average, and the > acpi module might use a different formula and/or different params (the > coretemp is likely more correct, being very hw-specific). An average of what? According to sensors, the machine only has temp sensors on the CPU dies, not on the hard drive or memory or whatever. And the apci and /proc temps are not the average of the core temps. >> Also, am I to believe that "crit = +100.0??C" means that the CPU can >> get up to 100 degrees before damage? This is an Intel CoreDuo > > 120+ degC actual silicon T isn't uncommon as max operating T. 100 degC > is likely a derating which allows for a reasonable margin before the > chip goes out of spec. Really? I've melted older (pentium 3,4) CPUs at around 80, probably even less. I don't know how far the sensor on the P4 is from the die, but it can't be _that_ far. AMD's I've seen get that hot and live (well, once). I understand that they are made of the same materials in similar processes, but the differences are probably akin to Huyndai and BMW (same basic idea, huge quality difference). > Physical damage occurs at quite higher T. > Of course, don't expect much long-term reliabilty if you keep your chips > close to that limit for long time (or better, with high duty-ratio). I try not to :) I actually find that Arctic Silver can make a few degree change in temp, even with a clean heatsink and a decent fan. Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing?
