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can i control case fan speed?

shazammm
By shazammm
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i have 2 arctic p14 140mm fans(3pin) . they are really loud eventho they are advertised at low db levels. they run at 60% rpm. is there any way i can lower the speed? i have an asus z370 prime II mobo. tried through bios but in the fan curve i cannot set them lower, there are 2 options there pwm and dc. if i set pwm they ran even louder. if i set silent mode in the dc it doesn't do anything it just modify the curve at higher values. i'd like to set them at 50% or 40% , is there any way?

:)

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PWM mode is for fan with 4 pins, so DC mode it is.

Are you able to set a custom DC fan curve? Or maybe you could drag the nodes down a bit?

"We're all in this together, might as well be friends" Tom, Toonami.

 

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

 

mini_cardboard: a 4% keyboard build log and how keyboards work: https://linustechtips.com/topic/1328547-mini_cardboard-a-4-keyboard-build-log-and-how-keyboards-work/

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10 minutes ago, minibois said:

PWM mode is for fan with 4 pins, so DC mode it is.

Are you able to set a custom DC fan curve? Or maybe you could drag the nodes down a bit?

even tho 3pin is for DC, i can set it to pwm in the bios , but it's louder than the DC so no use for it,and in the DC settings

i tried that in the curve but the curve doesn't want to go lower than 60% , that is 60% of 1700rpm. so they stay at around 1000rpm i can modify the curve at higher rpm but not lower than 60%. and for me they are really LOUD because i was used to a quiet case. i have an silentiumpc fera 3 120mm cpu fan that 99% of the time run between 600-1000 rpm and it's really quiet even in gaming. but these arctic p14 are advertised at 0.3 sone (22.5-24.5 db) at 1700 rpm ! that's defenetily a lie. they are really noticeble even at 1000rpm. they run at 12v most likely.

:)

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5 minutes ago, shazammm said:

even tho 3pin is for DC, i can set it to pwm in the bios , but it's louder than the DC so no use for it,and in the DC settings

i tried that in the curve but the curve doesn't want to go lower than 60% , that is 60% of 1700rpm. so they stay at around 1000rpm i can modify the curve at higher rpm but not lower than 60%. and for me they are really LOUD because i was used to a quiet case. i have an silentiumpc fera 3 120mm cpu fan that 99% of the time run between 600-1000 rpm and it's really quiet even in gaming. but these arctic p14 are advertised at 0.3 sone (22.5-24.5 db) at 1700 rpm ! that's defenetily a lie. they are really noticeble even at 1000rpm. they run at 12v most likely. any way to reduce the voltage to 9v at least?

The 4th pin on a 4 pin fan is the PWM pin:

Image result for PC fan pinout

Very likely your board is sending full power to the 3 pins, because it expects to be able to control a fan via the 4th pin.

 

One of the disadvantages of DV control is that there is a higher lowest fan speed as compared to what you could do with PWM. 60% is not that weird as a lowest speed, from what I have experienced.

Perhaps there are separate fan controllers that have a more granular voltage control on the fan.. But 3 pin fan controllers are becoming a bit more rare in my experience.

"We're all in this together, might as well be friends" Tom, Toonami.

 

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

 

mini_cardboard: a 4% keyboard build log and how keyboards work: https://linustechtips.com/topic/1328547-mini_cardboard-a-4-keyboard-build-log-and-how-keyboards-work/

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3 minutes ago, minibois said:

The 4th pin on a 4 pin fan is the PWM pin:

Image result for PC fan pinout

Very likely your board is sending full power to the 3 pins, because it expects to be able to control a fan via the 4th pin.

 

One of the disadvantages of DV control is that there is a higher lowest fan speed as compared to what you could do with PWM. 60% is not that weird as a lowest speed, from what I have experienced.

Perhaps there are separate fan controllers that have a more granular voltage control on the fan.. But 3 pin fan controllers are becoming a bit more rare in my experience.

all my mobo fan controlers are 4 pin, while the p14 fan is 3pin. already knew that they cannot be controled with pwn.  i was not issuing this problem.

i was asking if is there a way that i can lower the rpm from 60% to some lower value since these are loud for me.some way like setting manualy the voltage and in that way making the rpm go lower

:)

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17 minutes ago, shazammm said:

i was asking if is there a way that i can lower the rpm from 60% to some lower value since these are loud for me.some way like setting manualy the voltage and in that way making the rpm go lower

Can't find any info in the motherboard if it can do this and I am not familiar with any DIY ways to achieve this.

Does look like certain fan controllers can achieve this:

image.thumb.png.6f57115fcd73671212cbe122e873729b.png

https://www.amazon.com/Phanteks-Universal-Fan-Controller-PH-PWHUB_02/dp/B07NHQRCRM/ref=sr_1_3?crid=3NFN08S6NKV4W&keywords=3+pin+fan+controller&qid=1575040710&sprefix=3+pin+fan+cont%2Caps%2C209&sr=8-3

 

(It has a couple 3 pin and 4 pin headers on it)

"We're all in this together, might as well be friends" Tom, Toonami.

 

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

 

mini_cardboard: a 4% keyboard build log and how keyboards work: https://linustechtips.com/topic/1328547-mini_cardboard-a-4-keyboard-build-log-and-how-keyboards-work/

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Which header is each of the fans plugged into? Have you tried using a custom curve?

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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8 hours ago, WoodenMarker said:

Which header is each of the fans plugged into? Have you tried using a custom curve?

image.thumb.png.0733bcc100a78fefa5d43c01b4277958.png

the one to the right was the only one available. pluged only one fan,no header for the other one available. already said i've tried from asus bios to lower the curve at the lower temps under 60% and it won't let me go under this value

:)

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10 hours ago, shazammm said:

the one to the right was the only one available. pluged only one fan,no header for the other one available. already said i've tried from asus bios to lower the curve at the lower temps under 60% and it won't let me go under this value

Did you try Fan Xpert Tuning? It may take a few tries to properly detect the fan rpm range. 

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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2 hours ago, WoodenMarker said:

Did you try Fan Xpert Tuning? It may take a few tries to properly detect the fan rpm range. 

gave up with asus bios. tried anything to set it lower than 60% but any value i entered lower than 60 it showed ''invalid input'' , set fan off from bios and instalaed a software where i manage to set it lower

:)

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