From mboxrd@z Thu Jan 1 00:00:00 1970 From: Karol Kozimor Subject: Re: acpi, c# states and scaling processor: temp variation can damage my cpu or laptop? Date: Sun, 2 Jan 2005 19:16:08 +0100 Message-ID: <20050102181608.GB15182@hell.org.pl> References: <41D83070.1000606@yahoo.com.br> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Return-path: Content-Disposition: inline In-Reply-To: <41D83070.1000606-/E1597aS9LRfJ/NunPodnw@public.gmane.org> Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: "Francisco Figueiredo Jr." Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org 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 ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt