CPU Temperature Fluctuating

[Kangarombi]

Hello everybody,

 

For the last two days my PC has started to act a little weird, starting to blow the fans really hard as soon as the system is put under stress. That started to concern me and I checked on my temperatures, to see the CPU temps fluctuate wildly under stress. Each core seems to have its own life, literally skipping from temps in the 30s up into 60s and everything in between in split-seconds. I am pretty sure that is not normal. The PC has been built about 8 months ago and in use without problems so far. The setup is as follows:

 

intel Core i7-8086k

ASRock Z370 Killer SLI

Nvidia GTX 1060 6gb

Dark Rock Pro 4

Corsair Vengenance V650M

 

I know the processor is overkill on that system, so far it hasn't shown any trouble, usually running around 65 Celsius under Stress. I received it in the sweepstakes when they released  it.

 

I did some research and some things I read suggested that it might be problems with the Mobo or PSU, but I am not an expert in these things, so I was hoping to get some help here.

 

Edit: The fluctuation is different for each core, which means that I have cores at 60°C while others are at 35°C and others at 45°C and all the in between, while each going up and down in these temperatures independent from each other.

 

Thanks in advance,

Kangarombi 

[Derrk]

30 to 60 under stress doesn't seem too extreme. i wouldn't worry about it unless you start getting much much hotter temps

[Kangarombi]

Thanks for the quick reply. 

 

The temperature is not what concerns me, but the fact that the sensors are fluctuating wildly and in turn make the fans go wild and loud. Could there be a problem with the voltage or something?

[Derrk]

6 minutes ago, Kangarombi said:

Thanks for the quick reply. 

 

The temperature is not what concerns me, but the fact that the sensors are fluctuating wildly and in turn make the fans go wild and loud. Could there be a problem with the voltage or something?

if it's auto voltage, it could cause large spikes. But generally, adding a load to an otherwise idle cpu, will cause temps to spike. It's not hot enough to throttle, so it shouldn't be too big of a concern.

One thing you could try is remounting the cpu cooler. Sometimes after extended use, thermal paste kind of (i don't want to say dries out), but loses some efficiency

 

Side note, welcome to the forum! You should use quote reply in the future, or i won't get a notification that you commented

[Guest]

You have to remember that some programs/games utilize one or more cores specifically and can cause the fluctuation you're experiencing.

As for your fans spinning faster and becoming louder, I agree with @Derrk. I would say that you have auto-voltage enabled in your BIOS. I'm sure you know how to get in the BIOS so I won't go through it step by step.

 

If you don't, no judgment, let me know and I'll guide you through.

[Kangarombi]

13 minutes ago, Netivity said:

You have to remember that some programs/games utilize one or more cores specifically and can cause the fluctuation you're experiencing.

As for your fans spinning faster and becoming louder, I agree with @Derrk. I would say that you have auto-voltage enabled in your BIOS. I'm sure you know how to get in the BIOS so I won't go through it step by step.

 

If you don't, no judgment, let me know and I'll guide you through.

Thanks @Netivity,

I know how to get into BIOS. What exactly is the auto-voltage doing, if you don't mind me asking? I suppose you are suggesting to disable that function in order to keep the fans down?

 

EDIT: In my case they seem to totally go out of control even though the temps are fine. It shows me a max of 56000rpm, although they are running at 2000rpm according to the program (I suppose that's a glitch), but never slow down again even though the system isn't under stress anymore. This only concerns the case fans.

[Guest]

5 minutes ago, Kangarombi said:

Thanks @Netivity,

I know how to get into BIOS. What exactly is the auto-voltage doing, if you don't mind me asking? I suppose you are suggesting to disable that function in order to keep the fans down?

 

EDIT: In my case they seem to totally go out of control even though the temps are fine. It shows me a max of 56000rpm, although they are running at 2000rpm according to the program (I suppose that's a glitch), but never slow down again even though the system isn't under stress anymore.

Well, if you disable auto-voltage, it keeps the component at the factory voltage settings. If you enable it, it can allocate and increase voltage and therefore speed.

 

I am sure that there would be an option in your BIOS/UEFI that allows you to set the speeds of the fans (2000RPM) and disable it to increase RPM when needed. However, not knowing your fan set up. I would ALWAYS recommend to have the chassis fans set to a certain speed and the CPU fan to auto increase RPM.

 

Out of curiosity what program are you using to control fan speeds?

 

 

[Kangarombi]

Just now, Netivity said:

Well, if you disable auto-voltage, it keeps the component at the factory voltage settings. If you enable it, it can allocate and increase voltage and therefore speed.

 

I am sure that there would be an option in your BIOS/UEFI that allows you to set the speeds of the fans (2000RPM) and disable it to increase RPM when needed. However, not knowing your fan set up. I would ALWAYS recommend to have the chassis fans set to a certain speed and the CPU fan to auto increase RPM.

 

Out of curiosity what program are you using to control fan speeds?

 

 

@Netivity

Not using a program to control the fan speed. I was using the information from CPUID on the fanspeed.