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Re: Powerbook G4 1.33 GHz CPU temperature

On Mon, 06 Sep 2004 the mental interface of
Sam Zoghaib told:

> Hello,
> The current (default) setting for therm_adt76x is to start the CPU fan at
> speed 128 when the CPU temperature reaches 50°C (that is, 122 °F). It's set
> at speed 255 when it reaches 55°C (134 °F).
> However, with these settings, the fan is almost all the time at speed 128.
> If I don't do anything, the temperature is around 48°C.

So why is your fan running at this temperature? The fan starts
definitly at 50°C at the default setting. Have a look at
"modinfo therm_adt76x" to manipulate the default.

> According to threads on newsgroups, MacOS only starts it when the
> temperature reaches around 70°C (160°F). I don't know first hand as I've
> never used it.
> So my question is, what's the best treshold to use? Is it necessary to have
> the fan start at 50°C, or is there a better setting ?

In my opinion you won't get an answer here. There must be someone
cooking his cpu at _70_°C to tell some experience. Hmm, if so, does
the cpu exist anymore? Is try and error the best way to find it out?
I am using the 49 degree hysterese at my 1GIG AlBook ;-)
And search for the tread "therm_adt746x" in this mailing list. Maybe
there some hints available ;-)



  "Talking much about oneself can also 
   be a means to conceal oneself."
         -Friedrich Nietzsche

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