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    SubjectRe: temperature standard - global config option?
    Date
    John Chris Wren writes:

    > coupling to the CPU that is about as bad as it can get. You've got an epoxy
    > housing of an inconsistent shape in contact with ceramic. The actual
    > contact point is miniscule. There's no thermal paste, and often, I've seen
    > the sensors not quite raised high enough to contact the chip (you should be
    > able to rack a business card across the empty socket and feel a slight
    > "bump" as you touch the sensor. If not, you need to bend it up slightly, to
    > give better physical contact to the CPU).
    >
    > But in spite of all this, you're not really measure the critical
    > temperature, which is junction tempature. Yes, case tempature has *some*

    There are processors with temperature measurement built right
    into the silicon.

    > For the record, in the course of a normal day, I see my temperatures
    > fluctuate from 48C with the house A/C set to 73, to 56C when I open the
    > doors, and let it get up to 76 in the house. That's 8C (14.4F) over a 3F
    > change in ambient.

    This makes sense. Heat increases resistance, which generates heat.
    At some point, a tiny increase will cause thermal run-away.

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