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Thread: Core temperatures

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    Core temperatures

    Why the devil do speedfan/Core temp 0.94 show such different core temperatures to my bios? The bios says about 50 degrees (i guess for both cores) and the programs say about 35 degrees for one and 40 degrees for the other...what's going on?

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    coretemp is usually pretty reliable, as long as it reads under 60, you are fine.

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    http://www.thecoolest.zerobrains.com/CoreTemp/
    apparently the best temp monitoring app available
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    CoreTemp reads the digital thermometer in the centre of your core in its hottest point. Its the same thermometer the chip will use to determine when it gets too hot and its time to shut itself down or throttle down.

    SpeedFan however, uses the thermometer under the chip on the actual motherboard instead. Its the same one used by your BIOS. Its an accurate reading... but its accurately reading the outside of the chip which isn't as hot as the inside.

    So when comparing your temps to other peoples', its worth knowing exactly what they used to test their chip.

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    Thank you for your reply acrobat... The thing is, Bios actually show a temperature of 50ish degrees whilst CoreTemp shows 40. what do you think thats about?

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    Flat cap, Whippets, Cave. Clunk's Avatar
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    Grab the Intel Thermal Analysis Tool (TAT) from their website.

    They do one for watercooling as well, Intel Thermal Watercooling Analysis Tool (I-rubbishrubbishrubbishrubbish) aparently.

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    Does TAT work for AMDs?

    Haha, I-rubbishrubbishrubbishrubbish.

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    Are both readings while the PC is in the same state? In other words, is one while the PC is idle, and the other one while the PC is doing stuff?

    If not, then I dont know why that would be.

    Although, all my info was about the new Intel Core2Duo, so maybe your A64 X2 chip works differently. Either that or your motherboard.

    Another possibility is that its cooler in CoreTemp because the centre of the chip is kept at a good temperature, while the BIOS temperature is reading the underneath of the chip, and maybe its just a bit hotter under there.

    And if you are still concerned about the temps, you can google your chip and compare it to other peoples temperatures. Here is an example of one link you could read:

    http://forums.amd.com/lofiversion/index.php/f7.html

    If you come to the conclusion that you are unhappy with the temps, there are a few things people will likely ask you first. Here are what comes to mind:

    1) Do you have good cooling in the case? A fan in the front sucking air into the case? And a fan in the back blowing the hot air out of the case?

    2) Is the heatsink and fan fitted onto the CPU securely? With all 4 corners pushed all the way in and clipped into place securely?

    3) Did you apply thermal compound to the CPU, if so, did you use the right amount?


    Before you start worrying about the temps though, it would be worth comparing it to other people. Like I said above though, just make sure you compare the right temps with the right temps. Because if the BIOS reads somewhere else on the chip, or maybe its an outdated bios, or maybe the bios sensor is broken etc... its not good to compare. So its probably trying to find what other people with your chip get in "CoreTemp" and compare to that.

    Good luck. Let me know how it goes. I am having the same problem at the moment by the way, but with an Intel C2D. Its a pain in the bum

    Quote Originally Posted by Clunk View Post
    Grab the Intel Thermal Analysis Tool (TAT) from their website.

    They do one for watercooling as well, Intel Thermal Watercooling Analysis Tool (I-rubbishrubbishrubbishrubbish) aparently.
    lol. Does that work for AMD chips?

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    oops, sorry, for some reason, I thought you were on C2D

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    Quote Originally Posted by Clunk View Post
    oops, sorry, for some reason, I thought you were on C2D
    I blame me Cause im always talking about them and stuff.

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    Quote Originally Posted by acrobat View Post
    SpeedFan however, uses the thermometer under the chip on the actual motherboard instead. Its the same one used by your BIOS. Its an accurate reading... but its accurately reading the outside of the chip which isn't as hot as the inside.
    Sorry, but it's just not accurate. They can be, but you'll struggle to find 2 identical motherboards (BIOS or software) that report the same temps within about 2c, and many vary up to around 10c. It's the stupidest little thing to sort out, yet even 5-10 years after temp reporting diodes hit mainstream computers, they still can't accurately tell us the temperature of the CPU. It's annoying, as the technology isn't just there, but as TAT and CoreTemp proves, is actually embedded in the CPU already.

    They shouldn't really be used for anything other than to give you a rough indication of increases. They certainly can't be compared between 1 motherboard and another.

    CoreTemp/TAT has been very accurate in all the checks I've used so far though. Much less variation.

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    Quote Originally Posted by Clunk View Post
    Grab the Intel Thermal Analysis Tool (TAT) from their website.

    They do one for watercooling as well, Intel Thermal Watercooling Analysis Tool (I-rubbishrubbishrubbishrubbish) aparently.
    I thought TAT was for Pentium M Mobile processor only? I learn something new every few minutes.... often the same thing unfortunately!
    Try to make each and every day the best it can be.

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    Flat cap, Whippets, Cave. Clunk's Avatar
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    its for C2D

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    Thanks Intel need to update their readme and support docs, I just installed it and it says:

    The Intel Thermal Analysis Tool supports the following genuine Intel mobile processors:

    Pentium-M (CPUID: 6EX)
    Pentium-M (CPUID: 6Fx)
    Pentium-M (CPUID: 66X, Extended Model: 1)

    The Intel Thermal Analysis Tool supports only Intel chipsets.
    Try to make each and every day the best it can be.

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    I think that maybe originally it was just for Pentium M, I know it wouldnt work on my celery M, but it works fine on C2D mobile and C2D conroe and allendale

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    Sorry for the thread bump. I was just wondering whats a decent Idle temp for a E6300? Currently I'm running the thing at stock speed and getting 37-40C idle (according to TAT) is that ok? Using that Enermax Chakra case. Got the Freezer 7 Pro (with stock paste the MX1 stuff) on it running at 1000 rpm (slow speed) PC is uber quiet! (after I unplugged the 7600GT's fan from the card and plugged it to the mobo for Q-Fan throttling lol) Just wondering as some people are like ooh I'm idleing at 34 which I think is low.

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