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Windows 7: CPUID & CoreTemp register different temps

09 Sep 2009   #1
kreesdqban

Windows 7 Ultimate x64
 
 
CPUID & CoreTemp register different temps

I have CPUID Hardware Monitor and Core Temp open and both are registering different temperatures for my CPU. The programs are a whole 10 degrees C off.... Are there known compatibility issues with either of these programs?


My System SpecsSystem Spec
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09 Sep 2009   #2
zigzag3143

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by kreesdqban View Post
I have CPUID Hardware Monitor and Core Temp open and both are registering different temperatures for my CPU. The programs are a whole 10 degrees C off.... Are there known compatibility issues with either of these programs?
both are compatible but they may take temps in different places or in different ways so either or neither could be correct. You just want to use them for trends.

Ken
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09 Sep 2009   #3
kreesdqban

Windows 7 Ultimate x64
 
 

I don't understand how that would work... If they are registering numbers so different then how do I use them to monitor normal and high temperatures?
My System SpecsSystem Spec
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09 Sep 2009   #4
Antman

 

Quote   Quote: Originally Posted by kreesdqban View Post
I don't understand how that would work... If they are registering numbers so different then how do I use them to monitor normal and high temperatures?
You use them to monitor temperatures read from the same location over a period of time. Each is consistent with itself.

I use RealTemp, CPU-Z and Core Temp - each for a different purpose. RealTemp reads the hottest, as it reads closer to the core. Another member can get a lot more detailed.
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09 Sep 2009   #5
kreesdqban

Windows 7 Ultimate x64
 
 

Ok so you're saying not to go by the actual numbers but to use them to identify something "out of the ordinary", I get it. I don't mean to nag, but what I don't understand is how they could both have different readings. To take a temperature reading you have to use a thermometer, and I'm guessing there aren't 4 different thermometers to read the temperatures on 2 cores. Wouldn't the software tap into the existing hardware (thermometers) and get the reading off of them instead of as you said "closer to the core"?
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09 Sep 2009   #6
Antman

 

This is one area where I am satisfied not to care much about the detail. Sorry. I just know that there are several locations to read temps from and mobos vary widely on how and where they do it.

This is from SpeedFan:

To find your CPU's temperature sensor you can leave your system idle for a few minutes, to let temperatures drop, and then go to 100% usage for a while. The temperature that rises faster is the one you're searching for. Other available temperature readings usually come from your sensor chip itself, from the southbridge, the voltage regulator, or even from an additional probe placed under the processor. This additional temperature sensor is not necessarily a duplicate. Some CPUs are not actually able to report the internal temperature from their die. To be able to read their temperatures, an additional external sensor (thermocouple) is used. In such cases, you will see two temperatures referring to the processor. The higher of the two is from the die. As a final note, please remember that not all available temperature sensors are actually connected to something. If you happen to read unusually high or low temps, they are likely to be from a disconnected (unused) temperature sensor.
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09 Sep 2009   #7
kreesdqban

Windows 7 Ultimate x64
 
 

That was slightly helpful lol.

Well I downloaded SpeedFan and compared them to CPUID Hardware Monitor and Core Temp and found that Core Temp and SpeedFan displayed the same values, CPUID displayed values exactly 10 degrees higher, consistently.

Your previous info might answer why that is, but I'm going to stick to Core Temp seeing as it has a nice taskbar option.

Thanks for the help Antman. +1 for you!
My System SpecsSystem Spec
09 Sep 2009   #8
Antman

 

Quote   Quote: Originally Posted by kreesdqban View Post
That was slightly helpful lol.
Chuckle.

That's me... always willing to be slightly helpful.

Keep in mind - every 10 degrees that the temps drop, your lifespan for the CPU/components increases dramatically.

RainMeter has some plugins that will allow you skin your temp readings into nice little desktop gadgets.
My System SpecsSystem Spec
09 Sep 2009   #9
pbcopter

Windows 7 Ultimate x64 SP1, Windows 8.1 Pro x64, Windows 10 Pro x64
 
 

One other thing, if it is an Intel processor, what is really shown is a measurement based on Tjmax and some programs use a different value for this. I have an Intel E8500 and one program defaults to 90 C Tjmax and another 100 C Tjmax, therefore what is displayed as core temperature is 10 C different in the two programs. I have to set any program I use (if possible) to use 100 C which is the correct Tjmax for my processor.

Additional: If you look at the Realtemp site you will find info on calibration which also explains that near the low end of the temperature range, there are large inaccuracies since all Intel wants to do is monitor the high end to prevent catastrophic overtemps.
My System SpecsSystem Spec
10 Sep 2009   #10
skunksmash

SEVEN x64
 
 

download ''Everest'' & ''Speedfan'', then run all 4 temperature apps.....from here you'll be able to work out your ''average'' temp from all the results...

HERE are the specs for your chip, as long as your ''core'' temps are within the 90c bracket i wouldn't worry about it, (70c is about the limit before you need to seek some aftermarket cooling)
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 CPUID & CoreTemp register different temps




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