On Wed, 9 Sep 2009, Alexander Motin wrote: > > around 100C. I did pull the c2d cpu docs at one point trying to > > look at cpufreq. If you are bored, you can grab the docs from > > intel and double check. > > AFAIR C2D supports three protection technologies. When CPU is hot, it > starts reducing frequency (multiplier) and voltage, alike to IEST. If > it is insufficient, it starts to skip core cycles, alike to TCC. If > it is still insufficient and temperature rises above about 100C, > emergency shutdown happens.
Hmm, I have since realised it's an E2140 which doesn't have Core2Duo branding (I don't know if it really IS one or not). On the bench here I could not observe an effect by running dd if=/dev/zero bs=128k count=5000| md5 in a loop and checking the frequency with dev.cpu.0.freq However the idle time seemed to go up, but only to 10% or so, it was quite odd.. Still, now I have been reminded of coretemp I can monitor it on "suspect" systems :) -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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