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CPU fan randomly spinning at max rpm

post #1 of 16
Thread Starter 
My Noctua NH D15 starts to randomly spin at about 1.2k-1.5k RPM randomly and then going back to about 500 (as in when there is no load or when there is like 50% load). It could be when I'm doing nothing (computer is just idle) or when I am browsing the internet or playing a game.

This has only started 4 days ago and before that I have had no issues.

I have checked the cpu temps when it randomly ramps up to high RPM and they are only going up by like 4-5 degrees Celsius.
I have checked task manager to see if anything is causing random huge load and nothing is doing that.
I have checked for malware and trojans and there weren't any as far as I know.
I have opened up the pc disconnected and reconnected the fans and that didn't do anything.
On safe mode it seems to run fine.

Does anyone have any idea what else I can do to fix this????
post #2 of 16
Quote:
Originally Posted by YasinA View Post

My Noctua NH D15 starts to randomly spin at about 1.2k-1.5k RPM randomly and then going back to about 500 (as in when there is no load or when there is like 50% load). It could be when I'm doing nothing (computer is just idle) or when I am browsing the internet or playing a game.

This has only started 4 days ago and before that I have had no issues.

I have checked the cpu temps when it randomly ramps up to high RPM and they are only going up by like 4-5 degrees Celsius.
I have checked task manager to see if anything is causing random huge load and nothing is doing that.
I have checked for malware and trojans and there weren't any as far as I know.
I have opened up the pc disconnected and reconnected the fans and that didn't do anything.
On safe mode it seems to run fine.

Does anyone have any idea what else I can do to fix this????

What MB are you using, and what are you using to control the fan curve?
post #3 of 16
Quote:
Originally Posted by ciarlatano View Post

What MB are you using, and what are you using to control the fan curve?

I'm using Asus Z170-A
And controlling the fan using bios.
Do you think changing thermal paste could fix the problem?
I also noticed that the temps go up m by about 10 degrees Celsius as opposed to 3, the program that i used want that great
post #4 of 16
Quote:
Originally Posted by Yasin1 View Post

I'm using Asus Z170-A
And controlling the fan using bios.
Do you think changing thermal paste could fix the problem?
I also noticed that the temps go up m by about 10 degrees Celsius as opposed to 3, the program that i used want that great

It's not a thermal paste issue, that much I can tell you.

It really sounds like the fan curve isn't matched very well with your equipment. Have you used the Q-Fan Tuning to get the bandwidth of your fan set up in BIOS? If this is mismatched, it can cause spikes like this. Have you made sure the CPU fan is set correctly to DC or PWM? Those two, especially the tuning, are a good starting point.

The 10C spikes are not unusual at all, and are caused by background tasks.
post #5 of 16
Quote:
Originally Posted by ciarlatano View Post

It's not a thermal paste issue, that much I can tell you.

It really sounds like the fan curve isn't matched very well with your equipment. Have you used the Q-Fan Tuning to get the bandwidth of your fan set up in BIOS? If this is mismatched, it can cause spikes like this. Have you made sure the CPU fan is set correctly to DC or PWM? Those two, especially the tuning, are a good starting point.

The 10C spikes are not unusual at all, and are caused by background tasks.

I'm using the default settings right now. So PWM and the standard fan curve.
I'm still baffled as to why this is happening
post #6 of 16
Quote:
Originally Posted by Yasin1 View Post

I'm using the default settings right now. So PWM and the standard fan curve.
I'm still baffled as to why this is happening

I've had ASUS boards with turbo fan mode be this spikey. But, not in normal mode. There's no relation to cpu usage vs the fan spin up? If the temps are going up by 10, then it makes sense the fans would spin up as well.

What version of Windows? That it doesn't happen in Safe mode is a possible clue. After a normal boot, a capricious service is probably consuming extra cpu cycles just to annoy you. Might have to launch Process Explorer and follow the money, uh, clock cycles.

In the hardware cooling realm, the standard procedure is to blame the software first. And second.
post #7 of 16
Quote:
Originally Posted by MicroCat View Post

I've had ASUS boards with turbo fan mode be this spikey. But, not in normal mode. There's no relation to cpu usage vs the fan spin up? If the temps are going up by 10, then it makes sense the fans would spin up as well.

What version of Windows? That it doesn't happen in Safe mode is a possible clue. After a normal boot, a capricious service is probably consuming extra cpu cycles just to annoy you. Might have to launch Process Explorer and follow the money, uh, clock cycles.

In the hardware cooling realm, the standard procedure is to blame the software first. And second.

I'm on windows 10, there seems to be a very small relation between the usage and the random spinning which is what is worrying me (but the temps are increasing a little), I understand the fact that it should spin faster at them temperature spikes bu that hasn't occurred till like 4 days ago which is why I'm concerned.
post #8 of 16
Quote:
Originally Posted by Yasin1 View Post

I'm using the default settings right now. So PWM and the standard fan curve.
I'm still baffled as to why this is happening

Did you run Q-Fan Tuning?
post #9 of 16
Quote:
Originally Posted by ciarlatano View Post

Did you run Q-Fan Tuning?

no I haven't, should I do that now and see if the problem carries on???
post #10 of 16
Quote:
Originally Posted by Yasin1 View Post

I'm on windows 10, there seems to be a very small relation between the usage and the random spinning which is what is worrying me (but the temps are increasing a little), I understand the fact that it should spin faster at them temperature spikes bu that hasn't occurred till like 4 days ago which is why I'm concerned.

Try the Q-Fan tuning.

But, I'd still be suspicious of Winduhs. Worth running Process Explorer. When the behavior goes away in Safe mode, points to an issue in unsafe mode. Maybe check your power settings - Win10 maybe decided you weren't cooling it right. biggrin.gif
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