AI Suite Temperature readings

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yaqinhasan

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Sep 17, 2015
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I managed to overclock my i5 4690k to 4.3Ghz@1.25 volts(I lost the silicon lottery) with an NH-D15 on an Asus Z97-Pro Gamer motherboard. Now as far as stress-testing goes, I have used the following:
-AIDA64
-Prime95
-LinX
And all seemed to run fine
The issue is that when i run the benchmarks I checked the temperatures and they were around 60-65C(reported by HWmonitor, Speedfan and MSI afterburner). Now that's pretty good, however when I opened AI suite to check on my fan curve to modify it, I saw the "CPU" temperatures to be 35-40C, which is just dumb. I know that different stresstests and software will make the readings different however I didn't expect a 20C difference, especially on the motherboard's official software(I did to a complete reinstall to no avial)
If you have any idea why AI suite does this, please tell me. If you need any more information, don't hesitate to ask.
 
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Shaun o

Shaun o

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Oct 7, 2007
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The easy way to check what is reporting the correct temp and where from.
Is to power the system up and enter the bios of the motherboard.

Let it sit there at Idle, for a good few minuets and see what the bios is reporting the cpu temp at.
Then after a few minuets exit the bios.

And boot into windows.

Open up ASUS AI center and leave the system Idle for the same amount of time monitoring the temp of the cpu without any running software apps, or back ground tasks or processes running.

It should vary by about 6 to 8c. if it does. Due to just windows it`s self running.

I would go with the reading AI suite is reporting.

NB: There are two points on Intel board that are monitored.

1. The thermal sensor of the actual cpu die package embedded into the cpu die.

2. The external temp of the cpu socket of the board it`s self.

You have to know what program is monitoring what thermal sensor the one internal to the cpu, or the one sat or placed in most cases on the back side of the motherboard lined up at the center of the cpu socket.

That is why you have a 20c difference.From different temp monitoring programs.
yaqinhasan.
 
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yaqinhasan

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Sep 17, 2015
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It reports the temperature to be around 31-33C, AI suite even sometimes reports it to be lower (which if what you say is true, is not possible)
However i noticed that Fan expert 3(the fan control bit of the software) uses the core temperature or something similar as when I ran prime 95 adn temps go to about 60C, i can see the fan speed correspond to 60C and not the ridiculous 30C shown by AI suite itself. Now if this piece of software reports one temperature to the fan control and one to the user, that's rather stupid


 
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yaqinhasan

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Sep 17, 2015
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I understand the different CPU temperature measurement points (I use HWmonitor and researched them ahead). However what I don't understand is why Fan expert 3(the built-in fan control) corresponds to the detected core temperature but AI suite displays a completely random temperature (usually atound 25-30C off the core temp)

 
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CompuTronix

CompuTronix

Intel Master
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Nov 13, 2006
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yaqinhasan,

AI Suite is often inaccurate and can display the temperature of another sensor such as PCH or VRM misallocated as "CPU" temperature, so don't get stuck on it. The Core temperatures displayed in "Real Temp" and "Core Temp" are typically accurate, and can be used to verify the accuracy of Core temperatures in other utilities such as SpeedFan and HW Monitor.

Shaun o,

Respectfully, you are largely misinformed, so let's get this cleared up for your benefit, as well as for our Forum members and readers.

First, BIOS is not an accurate means by which to gauge idle temperature, since BIOS operates without power saving features. Idle in Windows is only at the lowest possible Core temperature when the processor's Power (Watts) dissipation, in this instance, the i5 4690K, is below 2 Watts. Idle temperature depends upon BIOS settings, Windows background processes and ambient temperature.

Second, after LGA 1366, Intel discontinued what you refer to as "The thermal sensor of the actual cpu die package embedded into the cpu die". So in proper terms, 2nd through 6th Generation processors (including i5 4690K) no longer have this single Analog "CPU" temperature sensor. Thermal measurement is performed by the individual on-Die "Digital Thermal Sensors" (DTS) for each Core, which is "Core" temperature.

Third, "Socket" temperature is an AMD term. There is no Socket temperature for Intel processors, nor has there been any Socket thermocouple sensor present on Intel motherboards for over a decade.

Please read the Intel Temp Guide so you can get yourself up to speed on this topic.

CT :sol:
 
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yaqinhasan

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Sep 17, 2015
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I use HWmonitor and speedfan, they both display around 60-65 around load, which the fan curve seems to adjust to that, which means AI suite does know how to see correct core temps. It isn't the VRM or PCH because tht is actually shown correctly in AI suite; however it may be the temperature on the socket, which for some reason asus uses that as "CPU" temp

 
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