acpi, c# states and scaling processor: temp variation can damage my cpu or laptop?

acpi, c# states and scaling processor: temp variation can damage my cpu or laptop?

[Francisco Figueiredo Jr.]

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Hi all,

sorry if this is not the right place to ask, but from msgs I think you
have a lot of background which could easily give me some light.

I'm having all this info about C# states, processor scaling and such.
I have my pentium 4 m with cpu scaling, (althought I don't have C2 or C3
support, only C1, is this ok?) and I easily can go from 44 C at 1.6G to
54C 55C at 2.8G if I start compiling something length. And this makes me
wonder: Can this damage my cpu? I mean, could this temp variation cause
some type of physical stress in cpu or even my notebook components? Or
cpu engineers already do it specting this type of behavior?

Thanks in advance for any tip.



- --
Regards,

Francisco Figueiredo Jr.
Membro Fundador do Projeto MonoBrasil - MonoBrasil Project Founder Member
http://monobrasil.softwarelivre.org



- -------------
"Science without religion is lame;
religion without science is blind."

~                  ~ Albert Einstein
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Re: acpi, c# states and scaling processor: temp variation can damage my cpu or laptop?

[Karol Kozimor]

Thus wrote Francisco Figueiredo Jr.:
> sorry if this is not the right place to ask, but from msgs I think you
> have a lot of background which could easily give me some light.
> 
> I'm having all this info about C# states, processor scaling and such.
> I have my pentium 4 m with cpu scaling, (althought I don't have C2 or C3

If that's really 2.8 GHz, then you're definitely talking about Mobile
Pentium 4, not a Pentium 4-M. Those are different beasts.

> support, only C1, is this ok?) and I easily can go from 44 C at 1.6G to

Well, not really perfect as C-states allow for substatntial power savings.
But then, I'm not sure whether Mobile P4 supports C2 or C3.

> 54C 55C at 2.8G if I start compiling something length. And this makes me
> wonder: Can this damage my cpu? I mean, could this temp variation cause
> some type of physical stress in cpu or even my notebook components? Or
> cpu engineers already do it specting this type of behavior?

It is unlikely to cause any harm, anyway, odds are your OEM has already
taken care of that and your machine will automatically shutdown if the
temperature gets too high. Check /proc/acpi/thermal_zone/*/* for citical
trip points.
Best regards,

-- 
Karol 'sziwan' Kozimor
sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org


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Re: acpi, c# states and scaling processor: temp variation can damage my cpu or laptop?

[Francisco Figueiredo Jr.]

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Karol Kozimor wrote:
| Thus wrote Francisco Figueiredo Jr.:
|
|>sorry if this is not the right place to ask, but from msgs I think you
|>have a lot of background which could easily give me some light.
|>
|>I'm having all this info about C# states, processor scaling and such.
|>I have my pentium 4 m with cpu scaling, (althought I don't have C2 or C3
|
|
| If that's really 2.8 GHz, then you're definitely talking about Mobile
| Pentium 4, not a Pentium 4-M. Those are different beasts.
|

Oooops, sorry for that. It is really a mobile pentium 4 and not 4-m.

|
|>support, only C1, is this ok?) and I easily can go from 44 C at 1.6G to
|
|
| Well, not really perfect as C-states allow for substatntial power savings.
| But then, I'm not sure whether Mobile P4 supports C2 or C3.
|

ok.

|
|>54C 55C at 2.8G if I start compiling something length. And this makes me
|>wonder: Can this damage my cpu? I mean, could this temp variation cause
|>some type of physical stress in cpu or even my notebook components? Or
|>cpu engineers already do it specting this type of behavior?
|
|
| It is unlikely to cause any harm, anyway, odds are your OEM has already
| taken care of that and your machine will automatically shutdown if the
| temperature gets too high. Check /proc/acpi/thermal_zone/*/* for citical
| trip points.
| Best regards,
|

Ok. In fact, the computer can handler well the high temps. The other
problem I'm checking is the temp variation from 42 to 54, 55 and so to
44 back when the job is done. Also, if I keep up and down with the temp,
could it cause some problem?

Thanks in advance.

- --
Regards,

Francisco Figueiredo Jr.
Membro Fundador do Projeto MonoBrasil - MonoBrasil Project Founder Member
http://monobrasil.softwarelivre.org



- -------------
"Science without religion is lame;
religion without science is blind."

~                  ~ Albert Einstein
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