linux-kernel - Re: [PATCH] Acer Aspire One Fan Control

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Message-Id: <1240913055.29860.14.camel@maxim-laptop>
Date:	Tue, 28 Apr 2009 13:04:15 +0300
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	petkovbb@...il.com
Cc:	Peter Feuerer <peter@...e.net>,
	LKML <linux-kernel@...r.kernel.org>, lenb@...nel.org,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: [PATCH] Acer Aspire One Fan Control

On Tue, 2009-04-28 at 09:25 +0200, Borislav Petkov wrote:
> Hi Peter,
> 
> On Mon, Apr 27, 2009 at 08:57:12PM +0200, Peter Feuerer wrote:
> > Hi Boris,
> >
> > thank you very much for your email.
> >
> > Borislav Petkov writes:
> >
> >> I did some testing on my Aspire One machine here and it looks pretty
> >> nice: while compiling a kernel watched the fan going on when the
> >> temperature reaches 67-68 (I don't think this is Celsius though, no?)
> >> and then turning itself off when temp goes below 60.
> >
> > It is Celsius, the specification of the chipset and the atom core say 
> > that the chips are allowed to get 99 degree celsuis hot. So I think 70 
> > degree Celsius are fine.
> 
> Their N270 datasheet
> (http://download.intel.com/design/processor/datashts/320032.pdf) talks
> about max Tj (junction temperature) being 90°C for a TDP of 2.5W and if
> you operate below that limit "functionality and long-term reliability
> can be expected." :)
> 
> There's also an internal termtrip sensor which is designed to go off at
> Tj=125°C so, yeah, I guess something 70°C should be ok.

I have small note:

So yes cpu can withstand 90 C, but will rest of the motherboard?

(Most other cpus are rated at 60C)


Regards,
	Maxim Levitsky

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