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From: Huaxu Wan on 18 May 2010 21:00
On 02:45 Tue 18 May, Dmitry Gromov wrote:
> Hi!
>
> And 90C seems to be good for N200 series of Atom CPUs only - I could not
> find TjMax value published for N330 Dual Core (quite popular one). Intel
> only published Tcase for it:
> http://ark.intel.com/Product.aspx?id=35641
> So, if for N270 Tcase = TjMax = 90C, then, I'd suggest to use Tcase = 85.2C
> for N330 TjMax value.

Quoted a sentence from [1], "Unless specified otherwise, all specifications for
the processor are at TJ = 90�C", I believe the TjMax of 330 is 90C too.

[1]http://download.intel.com/design/processor/datashts/320528.pdf

Thanks
Huaxu
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From: Huaxu Wan on 18 May 2010 21:30
On 09:01 Tue 18 May, Carsten Emde wrote:
> Dmitry,
>
> >>Here comes the current version of the coretemp patches. Huaxu did the
> >>initial work; Jean suggested to submit them directly to Andrew.
> >>
> >>I made some style changes as advised by checkpatch.
> >>
> >>The patches have been tested successfully on Core 2 Duo and Quad, and on
> >>Nehalem and Nehalem/Westmere where temperature readings were plausible and
> >>changed with load as expected. When tested on an Atom processor (N270), the
> >>temperature values were identical to previous versions of the coretemp
> >>module and also changed with load. However, the readings should be higher
> >>by 10 to 15C as compared to the outside temperature of the processor.
> >>Huaxu, could you check? I would guess TjMax to be 105 instead of 90C in these
> >>processors.
> >I apologize, if I ask a stupid question, but are you saying that TjMax in
> >coretemp.c should be set to higher value than Tcase-max value specified in
> >Intel documents?
> Hmm, no. I am saying that I would like the reading to be correct. I
> have measured the outside temperature of the case with an infrared
> thermometer [1] and found it to be higher than the readings returned
> by the coretemp module. In all other CPUs I have, the coretemp
> readings are higher than the case temperature.
>
> [1] http://www.osadl.org/uploads/media/IPCworld-2008-4.pdf
>

Hi Carsten,

I have no N270 and infrared thermometer in hand, so I can't check it by myself.
I'll find a channel and file this issue to them.

Thank you.


Huaxu
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