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    What is "THM_" in CPUID Hardware Monitor??

    Discussion in 'Dell XPS and Studio XPS' started by TriC, Mar 30, 2009.

  1. TriC

    TriC Notebook Enthusiast

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    I have an m1530 and was wondered what the "THM_" Reading is for?? it seems to get as hot as the GPU when gaming.

    its a temp reading in CPUID Hardware Monitor. but all it says is "THM_"
     
    TriC, Mar 30, 2009
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  2. Koer

    Koer Notebook Deity

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    I think its some part of your motherboard that controls BIOS- OS interaction, such as when changing power settings, and yeah it does seem to be the hottest part on my m1530...

    but i really dont know much about it...
     
    Koer, Mar 31, 2009
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  3. BatBoy

    BatBoy Notebook Nobel Laureate

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    I believe its your motherboard chipset temp...
     
    BatBoy, Mar 31, 2009
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  4. 7oby

    7oby Notebook Evangelist

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    THM_ is the reading from a software interface called "ACPI Thermal Zone" ( p. 332 in ACPI Spec).

    Each thermal zone is an independent control circuit with a sensor and and some cooling actions. Note that these cooling actions can direct ones such switching on a fan as well as indirect onese which throttle CPU performance.

    Anyway: A thermal zone software interface does not tell what it actually measures. Therefore the exact device is unknown. You would have to use cooling spray on different devices while the notebook is on to find out. Or disassemble the BIOS.

    Most likely it's one of these (in the order of likeliness):
    1. PM965/GM965 chipset temp
    2. ondie CPU temperature sensor measured by external control circuit ( deprecated)
    3. memory temp

    However it may even be as complicated as this one:
    MAX(Chipset;CPU;Memory)

    This way the thermal zone control circuit works regardless which component overheats.

    I do think however it's the chipset temp since it lags CPU load and CPU is connected to chipset by a heatpipe.
     
    7oby, Mar 31, 2009
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