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CPU Fan speed sound difference

Open Just-Card5027 opened this issue 2 months ago • 10 comments

I'm having an weird issue (i think) with the CPU fan sound. I've recently bought an new pc with W11 and installed Fan Control and everything seems to be working fine. I then decided to use Fan Control on my older pc because, when i switched from W10 to W11 the previous software that i used to control my cpu fans (ASUS Suite 3) seemed to have issues with W11. Now the problem i have is the sound it makes when at full speed. Before when it was running at full speed (1800rpm) it was noticibly very loud, but when using Fan Control to calibrate the cpu fan and then running it at full speed again (1800rpm) the sound is way softer than before, which makes me think that something is wrong or the fan isn't running at full speed despite the program saying it does.

Now i tried going back at what it was before by remove the Fan Control program (portable) but it didn't make a diference. I then went into the bios and used the default q-fan control settings but it also didn't make a difference. Am i not understanding something here or did something go wrong? Fan Control seems to be working fine on my new pc, when i ramp up the cpu fan speed to high lvl's it sounds about the same as the other fan before i had this issue. Hope sombody could help me with this, thx.

Just-Card5027 avatar Oct 23 '25 12:10 Just-Card5027

I know asus has some kind of "Quiet mode" that restricts the fans maximum speed. This will stick even if you don't have their software running. That's the only thing I can think of.

Rem0o avatar Oct 23 '25 13:10 Rem0o

I know asus has some kind of "Quiet mode" that restricts the fans maximum speed. This will stick even if you don't have their software running. That's the only thing I can think of.

I manged to download an Asus Suite 3 version that works with with W11 (yay) and i managed to turn off Extreme Quiet Mode and... it did nothing.

Just-Card5027 avatar Oct 23 '25 15:10 Just-Card5027

So it was on? Thought that might be it. Don't know if there is some kind of "overspeed" mode again only available with Asus stuff. In any case, pretty sure whatever it is you are experiencing is a non-standard weird Asus gimmick that FanControl doesn't have control over.

Rem0o avatar Oct 23 '25 20:10 Rem0o

So it was on? Thought that might be it. Don't know if there is some kind of "overspeed" mode again only available with Asus stuff. In any case, pretty sure whatever it is you are experiencing is a non-standard weird Asus gimmick that FanControl doesn't have control over.

Hope not. Whats weird is, my new pc is also an asus one and i'm not having any issues with it. My old pc does have something my new pc doesn't and thats an built in fan controller. The case has a switch on the front which lets me increase/decrease the case fan speeds. Is it posbile that there is an conflict with that? or... is one of my fans simply dying :) thx for the replies btw

Just-Card5027 avatar Oct 23 '25 22:10 Just-Card5027

Wait how is that fan controller and all your fans plugged in? Is it again an Asus motherboard specific thing? Because yeah said fancontroller might limit/impact what a software is able to do if it limits the maximum output of the headers for exemple.

Rem0o avatar Oct 23 '25 22:10 Rem0o

Wait how is that fan controller and all your fans plugged in? Is it again an Asus motherboard specific thing? Because yeah said fancontroller might limit/impact what a software is able to do if it limits the maximum output of the headers for exemple.

I have the PURE BASE 600 case. I have 2 fans on the front and 1 on the back. I think i have those 2 on the front linked together and installed on a fan header and the one on the back in an seperate header (can't check now) so 2 fans 1 header and 1 fan i header. If i turn the controller on max lvl all 3 fans spin faster, so all my case fans respond to the controller. Don't know if this matters but, when i look at Fan Control on my new PC, it detects my CPU fan and 2 of my case fans (not the third) but with my old pc its just the cpu fan (i disabled gpu stuff on both pc because i use afterburner) and non of the case fans.

Just-Card5027 avatar Oct 23 '25 23:10 Just-Card5027

About that controller.

If you set 100% in fancontrol, and then use the physical controller, do the fan speed changes?

If yes, then it's most likely like having 2 audio amps one after the other. To get max volume, you need to set both to the max. If the first amp is set to 50%, then going 100% on the second will still result in 50% volume, if that makes sense. So my guess would be you need to set that physical controller to the max all the time for FanControl to have all the effective range available.

Rem0o avatar Oct 24 '25 01:10 Rem0o

About that controller.

If you set 100% in fancontrol, and then use the physical controller, do the fan speed changes?

If yes, then it's most likely like having 2 audio amps one after the other. To get max volume, you need to set both to the max. If the first amp is set to 50%, then going 100% on the second will still result in 50% volume, if that makes sense. So my guess would be you need to set that physical controller to the max all the time for FanControl to have all the effective range available.

No, changing the fan controller does nothing to the cpu fan.

Just-Card5027 avatar Oct 24 '25 23:10 Just-Card5027

Well at that point I'm out of ideas.

Rem0o avatar Oct 25 '25 16:10 Rem0o

Well at that point I'm out of ideas.

Thank you for trying.

Just-Card5027 avatar Oct 25 '25 17:10 Just-Card5027