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Thread: "Core Temp" - CPU Temerature monitoring tool

  1. #76
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    Rather irritating really, i dont know what to believe, Crazy that mobo manufacturers and chip producers cant come up with one good methodology to measuse the temps. They make OCing a pain in the ass unless ur using phase or something.
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  2. #77
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    What i wondering about is this, in the INTEL PDF's intel specifies a TcaseMAX which is depended on the TDP.

    For the 2MB processors at the maximum TDP of 65watt intels specifies a temp of 61.4C

    For the 4MB processors at the maximum TDP of 65watt intels specifies a temp of 60.1C

    So this temperature is not the core temperature but the CPU temp.

    Where is this 85 degrees coming from?

  3. #78
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    85c is TCaseMax as far as I understand. It is the temp when throttling will kick in. I've seen it throttle at 85c when my heatsink wasn't on right using Everest.

  4. #79
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    Quote Originally Posted by sluzbenik
    85c is TCaseMax as far as I understand. It is the temp when throttling will kick in. I've seen it throttle at 85c when my heatsink wasn't on right using Everest.
    Someone needs to provide a proper explanation of the relationship between "Thermal Specification" and "TCaseMax". It makes no sense that the rated max stable temp of a conroe (60.1C) is 25C below the point of throttling (85C). When I'm running at full load using TAT to stress the CPU, my core temps peak at about 65-66C, and the machine rock solid stable.

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  5. #80
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    Well, from what have read right now I think:

    -TcaseMAX is a term used by intel in their core2duo specs, in those intel documents they given the TcaseMAX values. 60.1 degrees for a 4MB c2d, 61.4 degrees for a 2 MB c2d. (at a max TDP of 65watt) (go check the docs )

    -Thus, TcaseMAX can not be 85 degrees . Maybe something else is 85 degrees, like the throttle point, but not TcaseMAX.

    -Tcase according to intel is the CPU case temperature, measured in the centre. THIS is the value which should not go above 60.1/61.4 This is the temperature you measure for instance with speedfan.

    -The 2 cores have their own digital sensors, which you can read with TAT or everest. These cores will be hotter then the Tcase, and I have not seen intel specify the 60.1/61.4 degree limit for them. That is way people have their cores running above 60 without problems i guess.
    Last edited by catmull-rom; 09-21-2006 at 06:33 AM.

  6. #81
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    So is Tcase the temp of the PCB? Or the area under the IHS?

  7. #82
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    Quote Originally Posted by catmull-rom
    -Thus, TcaseMAX can not be 85 degrees . Maybe something else is 85 degrees, like the throttle point, but not TcaseMAX.
    Right, 85 C is the max temperature of the Junction, TJunctionMax. When the output of the integrated digital sensor gives 0, i.e. TJunction = TJunctionMax, the Thermal Control Circuit, TCC, start to throttle the processor through TM1 or TM2, it depends on the bios settings. Note that the processor still works at this temperature. The Core 2 Duo has another temperature limit, higher than TJunctionMax. When the core temperature reaches this temperature, the core stop the clock and raise the signal ThermalTrip that makes the mobo shut down the system.
    -Tcase according to intel is the CPU case temperature, measured in the centre. THIS is the value which should not go above 60.1/61.4 This is the temperature you measure for instance with speedfan.
    Speedfan gives the temperature output of an onboard chip that calibrates the current output of the thermal diode integrated in the core. This temperature il lower than TJunction and higher than TCase.
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  8. #83
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    It shows 10 deg lower then Bios and Asus Probe on my P5B Vanilla

  9. #84
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    Im running watercooling, stock volts and at 2.8ghz with my 6300.

    I get...Idle:
    50&53c using CORE TEMP.
    51c & 54c Using TAT (intels thermal prog)

    I get...Load:
    63c&63c using CORE TEMP.
    60c&60c using TAT (intels thermal prog)

    Are these temperatures good for a watercooled system that is at stock volts?

    Thanks,
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  10. #85
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    Quote Originally Posted by cool_dude
    Im running watercooling, stock volts and at 2.8ghz with my 6300.

    I get...Idle:
    50&53c using CORE TEMP.
    51c & 54c Using TAT (intels thermal prog)

    I get...Load:
    63c&63c using CORE TEMP.
    60c&60c using TAT (intels thermal prog)

    Are these temperatures good for a watercooled system that is at stock volts?
    Thanks,
    C_D
    I'd say definitely not.

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  11. #86
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    thought i'd share my experience

    for my E6700 B1 on Asus P5W DH @3600Mhz - 10x360fsb at 1.4v bios at idle, TAT reported 2-3C hotter than Coretemp app but under TAT 100% load test, TAT reported 2-5C cooler than Coretemp app.

    Idle:


    Load:
    Using TAT's 100% cpu work load test on both cores.


    Post Load idle:
    Again at idle, TAT reports 1-3C hotter than Coretemp app. But look at Asus PC Probe2 at 27C idle heh.


    Dual Stressprime 'Orthos' Small FFTs Load:
    Seems dual Stressprime doesn't generate as much heat as TAT's 100% cpu work load test. But again, under full cpu load, TAT reported upto 5C cooler than Coretemp app.

    Coretemp load = 65C
    TAT load = 60C
    Asus PC Probe2 = 51C



    So break down for idle to load and delta temps for:

    Coretemp
    cpu0 idle = 34-35C
    cpu1 idle = 37-39C
    cpu0 TAT load = 66-68C
    cpu1 TAT load = 66-68C
    cpu0 Stressprime load = 65C
    cpu1 Stressprime load = 65C

    TAT
    cpu0 idle = 36-37C
    cpu1 idle = 40C
    cpu0 TAT load = 65-66C
    cpu1 TAT load = 64-66C
    cpu0 Stressprime load = 59-60C
    cpu1 Stressprime load = 59-62C

    Asus PC Probe2
    cpu idle = 27C
    cpu Stressprime load = 51C

    Throw in Everest Ultimate Edition v3.01 in and it reports both cpu diode and core temps which seem to correspend exactly to Asus PC Probe2 and Coretemp app reported load temps.

    ---

  12. #87
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    Something is defenately bugged, its either the CPUs or the mobo temp sensor.
    I cooled my e6600 with a thermaltake bigwater 745 and its only 1 degree cooler compared to ty stock intel cooling and my zalman 9500!I lapped my cpu down to a smashing mirror finish, yet no difference. I called intel support line and they seem to have never ever heard of the heat issues(suuuure).They said its probably the boxed cooler, i laughed and said thanks for the help(expensive oversease call):S go figure.Intel are starting to piss me of. I get a reading of 78C on core temp @ load 1.425vcore and seem to be stable. Some of these Cpus are a disgrace for overclocking enthusiasts. I bet if i ripped out the phase it would probablky read those temps!
    Last edited by Ibinco; 09-24-2006 at 03:32 AM.
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  13. #88
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    Quote Originally Posted by astaris
    Right, 85 C is the max temperature of the Junction, TJunctionMax
    It that in the specification sheets? I'd like to read it.

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  14. #89
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    Quote Originally Posted by fornowagain
    It that in the specification sheets? I'd like to read it.
    From the datasheet:
    "Unlike taditional thermal devices, the DTS (Digital thermal sensor) will output a temperature relative to the maximum supported operating temperature of the processor (Tj,max). (...)The temperature returned by the DTS will always be at or below Tj,max. Over temperature conditions are detectable via an Out Of Spec status bit.(...)"
    This quote is from the thermal specifications of Core Duo and because of the same thermal control circuit and thermal monitors it shares with Core 2 Duo, we can assume that this stil is valid for Core 2 Duo. If you read the datasheet of Core 2 Duo, it is written that the DTS output is relative to the max operating temperature of the core and of course this is not TCaseMax because the core of the Cpu is a lot hotter than the case of the processor.
    Also this quote is for the people who likes speedfan or mobo reported temperatures:
    "(...) The reading of the external thermal sensor (on the motherboard) connected to the processor thermal diode signals, will not necessarly reflect the temperature of the hottest location on the die. This is due to inaccuracies in the external thermal sensor, on-die temperature gradients between the location of the thermal diode and the hottest location on the die, and time based variations in the die temperature measurement. (...)"
    I'm not saying that the mobo temp is not correct, all i'm saying is that, even if the thermal sensor calibration is perfect, its temperature will be different than the hottest temperature in the core because the thermal diode is integrated in a location more cold than the location where the DTS is. So both temperatures are correct if you understand them and none of them is comparable with Tcase.
    Last edited by astaris; 09-24-2006 at 05:39 AM.
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  15. #90
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    reporting 15-20deg hotter than Easytune, Smartguardian and Everest. Its wrong because the heatsink is not even warm.
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  16. #91
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    Quote Originally Posted by periquitos
    reporting 15-20deg hotter than Easytune, Smartguardian and Everest. Its wrong because the heatsink is not even warm.
    If you read carefully my last post you'll realize that a delta of 15-20 C is normal.
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    yes you post while I was typing
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  18. #93
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    The Intel "TAT" program - says we need to see our Intel representative to obtain support. I would take it to mean that's also the Point of Contact for the latest version.
    since this is reporting my Allendale and Conroe as a Pentium M, surely a new version is coming soon. Any idea on where to get it once it does come out? And any word on WHEN it is coming?

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    link is down

    can anyone host it anywhere and paste the link please
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  20. #95
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    It would seem that the core temperature probes are VERY close to the source of the heat in each core. It therefore makes sense that the temperature THERE would be less affected by cooling than the temperature as you get farther away.

    If you strike a match at the North Pole, it is still VERY hot in the middle of the flame.

    That would explain why you wouldn't see much difference in coretemp between a high-end, even water cooled, cooler and a stock one.

    (I'd bet that active cooling would show reduction in coretemp because it is truly cooling as opposed to just pulling the heat away.)

    The question I think everyone is really asking is - what core temperature is too hot and starts to endanger the lifespan of the processor? I think I'm hearing that if the coretemp ever were to hit 85, the processor would shut itself off. If that's true, than that is obvously too far. But are temps in the mid 60s to mid 70s dangerous?

  21. #96
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    Update!!!
    New version is out!
    Core temp now has its own website, no more posting and downloading it from a forum thread.

    Read the 1st Post for the links and info
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    Core Temp - Accurate temperature monitor for Intel's Core/Core 2 and AMD64 processors

  22. #97
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    Quote Originally Posted by The Coolest
    Update!!!
    New version is out!
    Core temp now has its own website, no more posting and downloading it from a forum thread.

    Read the 1st Post for the links and info
    Nice one mate. Grate program there.

    One problem, version 0.91 doesn't read temperatures below 17C on the AW9D-MAX board. Will the new version fix this or is it a flaw with the motherboard?

  23. #98
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    Well, thing is the temp that Core Temp reports solely depends on what the data that the DTS supplies it with.
    So if the DTS is bugging out on lower temps (and I've seen this happen before), there's nothing really that can be done
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    Core Temp - Accurate temperature monitor for Intel's Core/Core 2 and AMD64 processors

  24. #99
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    Quote Originally Posted by The Coolest
    Well, thing is the temp that Core Temp reports solely depends on what the data that the DTS supplies it with.
    So if the DTS is bugging out on lower temps (and I've seen this happen before), there's nothing really that can be done
    k, thought so. Thanks for the speedy reply

  25. #100
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    Quote Originally Posted by The Coolest
    Well, thing is the temp that Core Temp reports solely depends on what the data that the DTS supplies it with.
    So if the DTS is bugging out on lower temps (and I've seen this happen before), there's nothing really that can be done
    same when i had E6700 B1 on Kayl phase change coretemp didn't read lower than 11C heh

    New coretemp v0.93 and TAT along side older coretemp app

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    Last edited by eva2000; 10-20-2006 at 05:41 AM.
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