Where are the system cooling policy temperatures stored, how to modify RRS feed

  • Question

  • CPU is Phenom II 940.


    The active system cooling policy lets the CPU fan spin at 75% at 51°C, 83% at 54°C, 100% at 57°C.

    Windows 7 overrides by BIOS setting, which says "full speed at 45°C", the BIOS setting works as expected with Windows XP and Vista and linux.

    Can that be modified to spin at 100% when reaching 50°C or 45°C? Where are the exact values stored at which temperature the CPU fan is sped up?

    I do not have a stability problem, I just don't get it that Windows 7 overrides the BIOS setting, letting the whole machine get warmer than it should due to it's compact design (mostly the harddrives get as warm as over 10 year old SCSI-Server drives).

    Thursday, July 29, 2010 6:28 PM


All replies

  • Hi,
    What is the make/model of your motherboard? Typically Windows does not
    control fan speeds directly, rather they are usually handled through he
    BIOS and the drivers for the motherboard.

    -- Mike Burr
    Thursday, July 29, 2010 8:34 PM
  • Board: MSI DKA790GX Platinum ( AMD 790 GX chipset).

    CPU: Phenom II 940 BE

    Video: Asus Radeon 4890

    Extra stuff: Soundblaster titanium, Hauppauge TV card.

    Drivers: all from AMD (http://game.amd.com/us-en/drivers_catalyst.aspx) directly downloaded (currently V 10.7), except for realtek audio+LAN which are directly from realtek.

    With Windows 7 the system never saw a driver download from MSI.


    So you guess it may be the AMD Southbridge/whatever drivers which make the system ignore the BIOS setting? Or do you _know_ this?

    I did set the BIOS to "35°C target" which results in some noise until Windows is started, there the CPU gets as warm as described above.

    Friday, July 30, 2010 8:02 AM

  • Do you have the latest BIOS version installed? According to
    it's 1.E.

    It very well may be the AMD "Cool and Quiet" function. Look on page 3-20 in the owner's manual on how to double-check it. If you don't have the manual, you can download it from here:

    SC Tom

    Friday, July 30, 2010 10:53 AM