[gentoo-user] Re: lm_sensors show 2 different temp. for my CPU
On 08/04/2010 02:14 PM, Xi Shen wrote: hi, after i setup lm_sensors on my gentoo amd64, i ran sensors, and got the below output coretemp-isa- Adapter: ISA adapter Core 0: +61.0 C (high = +74.0 C, crit = +100.0 C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +61.0 C (high = +74.0 C, crit = +100.0 C) This is the sensor inside the CPU. The kernel doesn't know how to interpret this value on non-mobile CPUs, and it's usually off by 10C to 15C on desktop CPUs. CPU Temperature: +49.0 C (high = +90.0 C, crit = +125.0 C) This is the sensor on your motherboard that resides directly under the CPU. This an accurate temp and the kernel knows exactly how to interpret the values.
Re: [gentoo-user] Re: lm_sensors show 2 different temp. for my CPU
On Wed, 2010-08-04 at 18:22 +0300, Nikos Chantziaras wrote: On 08/04/2010 02:14 PM, Xi Shen wrote: hi, after i setup lm_sensors on my gentoo amd64, i ran sensors, and got the below output coretemp-isa- Adapter: ISA adapter Core 0: +61.0 C (high = +74.0 C, crit = +100.0 C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +61.0 C (high = +74.0 C, crit = +100.0 C) This is the sensor inside the CPU. The kernel doesn't know how to interpret this value on non-mobile CPUs, and it's usually off by 10C to 15C on desktop CPUs. CPU Temperature: +49.0 C (high = +90.0 C, crit = +125.0 C) This is the sensor on your motherboard that resides directly under the CPU. This an accurate temp and the kernel knows exactly how to interpret the values. This is windows specific but has lots on how Intel/AMD work. http://www.alcpu.com/CoreTemp/ This page seems to imply that Linux's use of coretemp is not as detailed as available to windoze users and if an unknown cpu will use a default value which may be incorrect. http://www.mjmwired.net/kernel/Documentation/hwmon/coretemp The lm_sensor temperatures (and voltages) are always highly suspect, usually being based on users experiments rather than manufacturer information which is usually not available. Also, I suspect variation even between motherboards of the same type as sometimes the supposed lm_sensors values for one of my systems (often cpu voltage) are not even close. BillK
Re: [gentoo-user] Re: lm_sensors show 2 different temp. for my CPU
thanks to both of you. :) On Wed, Aug 4, 2010 at 11:22 PM, Nikos Chantziaras rea...@arcor.de wrote: On 08/04/2010 02:14 PM, Xi Shen wrote: hi, after i setup lm_sensors on my gentoo amd64, i ran sensors, and got the below output coretemp-isa- Adapter: ISA adapter Core 0: +61.0 C (high = +74.0 C, crit = +100.0 C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +61.0 C (high = +74.0 C, crit = +100.0 C) This is the sensor inside the CPU. The kernel doesn't know how to interpret this value on non-mobile CPUs, and it's usually off by 10C to 15C on desktop CPUs. CPU Temperature: +49.0 C (high = +90.0 C, crit = +125.0 C) This is the sensor on your motherboard that resides directly under the CPU. This an accurate temp and the kernel knows exactly how to interpret the values. -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/