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sensors

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  sensors isuy <isuy@socal.rr.com> - 2016-08-26 12:14 -0700
    Re: sensors nixiguf@gmail.com - 2016-08-26 13:14 -0700
    Re: sensors Clemens Ladisch <clemens@ladisch.de> - 2016-08-26 22:25 +0200
      Re: sensors dlbendigo  <laidlaws@hotkey.net.au> - 2016-08-30 20:18 +1000

#3183 — sensors

Hi, I have AMD FX 4350 quad core cpu with stock air fan installed. The 
room temperature is about 25C, but sensors command shows cpu temp is 
16C. How is this possible?

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#3184

On Friday, August 26, 2016 at 12:14:41 PM UTC-7, isuy wrote:
> Hi, I have AMD FX 4350 quad core cpu with stock air fan installed. The 
> room temperature is about 25C, but sensors command shows cpu temp is 
> 16C. How is this possible?

testing...1 2 3...

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#3185

isuy wrote:
> I have AMD FX 4350 quad core cpu with stock air fan installed. The room temperature is about 25C, but sensors command shows cpu temp is 16C.

The documentation says:
| There is one temperature measurement value, available as temp1_input in
| sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree.
| Please note that it is defined as a relative value; to quote the AMD manual:
|
|   Tctl is the processor temperature control value, used by the platform to
|   control cooling systems. Tctl is a non-physical temperature on an
|   arbitrary scale measured in degrees. It does _not_ represent an actual
|   physical temperature like die or case temperature. Instead, it specifies
|   the processor temperature relative to the point at which the system must
|   supply the maximum cooling for the processor's specified maximum case
|   temperature and maximum thermal power dissipation.

(http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/hwmon/k10temp)


Regards,
Clemens

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#3186

Clemens Ladisch <clemens@ladisch.de> Wrote in message:
> isuy wrote:
>> I have AMD FX 4350 quad core cpu with stock air fan installed. The room temperature is about 25C, but sensors command shows cpu temp is 16C.
> 
> The documentation says:
> | There is one temperature measurement value, available as temp1_input in
> | sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree.
> | Please note that it is defined as a relative value; to quote the AMD manual:
> |
> |   Tctl is the processor temperature control value, used by the platform to
> |   control cooling systems. Tctl is a non-physical temperature on an
> |   arbitrary scale measured in degrees. It does _not_ represent an actual
> |   physical temperature like die or case temperature. Instead, it specifies
> |   the processor temperature relative to the point at which the system must
> |   supply the maximum cooling for the processor's specified maximum case
> |   temperature and maximum thermal power dissipation.
> 
> (http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/
Documentation/hwmon/k10temp)
> 
> 
> Regards,
> Clemens
> 

My CPU lost its thermal paste and
was overheating up to 70 deg C.
After being fixed, it shows about 35 deg.  I thought it was O.K.,
 but are you saying 
that the figure is meaningless and not equal to 35 deg C?
-- 

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