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Thread: Find out the Max Case Temperature and Max Power draw of your CPU

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  1. #11
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    The highest TCM that can ever be reported is 79C because of hardware limitation.
    The way that TCM works is this. There is a 4 bit field which contains the TCM value, you take that value, multiply by 2 and add 49 to the result.
    In other words: (TCMField * 2) + 49 = Actual TCM in Celcius.
    All mobile CPUs return TCM of 49C or "TCMField " of 0, because their actual TCM is too high to be programed into the processor. AMD also states that 49C TCM is "Not Used".
    Now different CPUs have different thermal profiles by which we determine the TDP, depending on the TCM reading.
    There are two possibilities here:
    a) The 49C chips we've been seeing lately are actually 49C/35W chips.
    b) These 49C chips have a TCM higher than the highest TDP value in a certain thermal profile, and thus this field in the CPU is just programmed with '0' instead to return no TDP at all.
    Last edited by The Coolest; 12-26-2005 at 07:46 AM.
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