Gentoo Archives: gentoo-user

From: meino.cramer@×××.de
To: Gentoo <gentoo-user@l.g.o>
Subject: [gentoo-user] How to correctly read CPU temperature ?
Date: Sat, 11 Sep 2010 05:16:32
Message-Id: 20100911051516.GA5559@solfire
Hi,

 with the command "sensors" (lm_sensor) I can read out the
 temperatures/voltages of my mobo/cpu:

    atk0110-acpi-0
    Adapter: ACPI interface
    Vcore Voltage:         +1.35 V  (min =  +0.80 V, max =  +1.60 V)
    CPU/NB Voltage:        +1.16 V  (min =  +0.80 V, max =  +1.60 V)
    CPU VDDA Voltage:      +2.50 V  (min =  +2.00 V, max =  +3.00 V)
    DRAM Voltage:          +1.51 V  (min =  +1.40 V, max =  +1.90 V)
    HT Voltage:            +1.20 V  (min =  +0.80 V, max =  +1.50 V)
    NB Voltage:            +1.10 V  (min =  +0.90 V, max =  +1.35 V)
    SB Voltage:            +1.11 V  (min =  +0.80 V, max =  +1.50 V)
    +3.3V Voltage:         +3.34 V  (min =  +2.97 V, max =  +3.63 V)
    +5V Voltage:           +4.97 V  (min =  +4.50 V, max =  +5.50 V)
    +12V Voltage:         +12.21 V  (min = +10.20 V, max = +13.80 V)
    CPU Temperature:       +35.0 C  (high = +40.0 C, crit = +90.0 C)
    MB Temperature:        +31.0 C  (high = +35.0 C, crit = +95.0 C)
    NB Temperature:        +46.0 C  (high = +65.0 C, crit = +95.0 C)
    SB Temperature:        +40.0 C  (high = +35.0 C, crit = +75.0 C)
    OPT_TEMP1 Temperature:  +0.0 C  (high =  +0.0 C, crit = +90.0 C)
    OPT_TEMP2 Temperature:  +0.0 C  (high =  +0.0 C, crit = +90.0 C)
    OPT_TEMP3 Temperature:  +0.0 C  (high =  +0.0 C, crit = +90.0 C)

 But there is something I worry about: The CPU temperature.

 On the Inet I found some, but not very clear infos, which say, that
 the temperature sensing diodes of the AMD Phenom II x6 T1090 were
 wrong. Second thing is, when idleing the CPU of my box has only 34
 degree C -- which would be nice if true, but I dont believe that:
 The CPU is cooled with a Scythe Mulgen 2 Rev.B or with other words 
 its only a fan and therefore only air cooling...

 When booted into the BIOS the "hardware info" shows a higher
 temperature for the CPU while idleing than the above shown command
 output. But: From where the BIOS takes its informations?
 Are there any "formula" to convert the raw value into the real world
 value? And from where I can take that formula?

 Thank you very much in advance for any help!
 Best regards
 mcc

 PS: Mobo is a "ASUS Crosshair IV Formula". I am neither a hard
 overclocker nor a gamer (no punt intended! :)

Replies

Subject Author
Re: [gentoo-user] How to correctly read CPU temperature ? Volker Armin Hemmann <volkerarmin@××××××××××.com>
Re: [gentoo-user] How to correctly read CPU temperature ? Paul Hartman <paul.hartman+gentoo@×××××.com>