From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Hartmann Date: Sat, 08 Sep 2012 19:15:21 +0000 Subject: Re: [lm-sensors] Strange temperature of AMD FX4100 cpu and power consumption Message-Id: <504B9949.9090009@01019freenet.de> List-Id: References: <504B7388.8020102@01019freenet.de> In-Reply-To: <504B7388.8020102@01019freenet.de> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: lm-sensors@vger.kernel.org Clemens Ladisch wrote: > Guenter Roeck wrote: >> On Sat, Sep 08, 2012 at 06:34:16PM +0200, Andreas Hartmann wrote: >>> I'm getting this temperature after more than one hour of activity >>> (mostly idle, load of the machine is: 0,11, 0,17, 0,21): >>> >>> temp1: +14.5=B0C (high =3D +70.0=B0C) >>> >>> 14.5=B0C is completely impossible as the surrounding temperature is >>>> 20=B0C. >=20 > Documentation/hwmon/k10temp 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 deg= ree. > | Please note that it is defined as a relative value; to quote the AMD ma= nual: > | > | 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 specif= ies > | the processor temperature relative to the point at which the system m= ust > | supply the maximum cooling for the processor's specified maximum case > | temperature and maximum thermal power dissipation. >=20 I already read this, too. My point of view is: If sensors says: "temp1: +14.5=B0C (high: +70=B0C)" then it is a temperature of +14.5=B0C and nothing else. If this value isn't a physical temperature (like the room temperature e.g.), why is it called temperature if it isn't one? However, if it is an instrument to manage a fan (or maybe a complete cooling system), I most probably would use a percentaged value, which reveals something about the actual required cooling capacity for the individual system. At least it would avoid misunderstanding IMHO. jm2c, thanks, kind regards, Andreas Hartmann _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors