q fan control optimize all not working

Asus Q-Fan Control won't let me set CPU_FAN less than 60%

reddit.com › r › buildapc › comments › ehqt9h › asus_qfan_control_wont_let_me_set_cpu_fan_less

A bit late to the party here but I solved the issue with Qfan Control. I recently purchased an Asus board and mine were all stuck at a minimum of 40% This is what you need to do. Open Qfan control and select the fan that's having this issue and change its mode to DC (yes even if it's a PWM) Set it to manual mode and a tickbox should appear saying Fan Stop. Make sure this is ticked Run the Qfan tuning You should now be able to go as low as you'd like. Switch the fan mode back to PWM if applicable (if you don't know just select auto and it'll choose the correct one) To stop this issue happening I now always keep my first point at 0% Answer from SirBeslington on reddit.com

Asus

rog-forum.asus.com › t5 › z170 › qfan-in-bios-doesn-t-work-bios-freeze › td-p › 644682

QFan in Bios doesn't work - bios freeze - Republic of Gamers Forum - 644682

March 6, 2024 - I'm having some issues with my Ranger motherboard. My Bios Q-Fan Control "Optimize All" button doesn't work as intended. It goes through my 4 case fans and my CPU fan and find the correct values but when it's done and the Qfan Tuning box appears and I click ok the box and the whole bios freezes and ...

reddit.com › r/buildapc › [troubleshooting] asus "optimize all" qfan questions

r/buildapc on Reddit: [Troubleshooting] ASUS "Optimize All" QFAN questions

February 26, 2021 - I tried out the "optimize all" QFAN functionality last night on my Z270e mobo with Cryorig H7 CPU fan (I also have stock fans on my NZXT S340 Elite case). I ran optimize all in the BIOS, but it ended up setting the Cryorig to run at 100% all the time in PWM mode.

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reddit.com › r/buildapc › asus q-fan control won't let me set cpu_fan less than 60%

r/buildapc on Reddit: Asus Q-Fan Control won't let me set CPU_FAN less than 60%

December 30, 2019 -

I am using a TUF X570 PLUS with a H115i and the damn bios won't let me set the pump fan speed at less than 60%. It is a standard 3 pin header (which means it is DC?). If it were a PWM, the minimum would be a much reasonable 20%. Setting it to either with manual mode doesn't make a difference anyhow. Can I edit those default minimum values?

EDIT:

thank you u/-UserRemoved- and u/coololly. I understand now that Q-fan control is useless here. But for some reason it seems like iCUE undereports the RPM speed. When I check with HWMonitor, I observe a much higher number which seems more accurate to the noise level coming from the PC (4400 vs 2300 RPM). Is this buggy software from Corsair or maybe a pump issue?

Top answer

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2 of 4

3pin does not have PWM, PWM is the 4th pin. Are you trying to set the pump at <60%? Or the fans? The 3pin header for the pump is likely only being used for the tach wire, which means changing any BIOS settings is doing exactly nothing. With Corsair AIO's pump speed is generally changed via software (iCue/Link via USB).

reddit.com › r/asusrog › q fan default settings or optimise all?

r/ASUSROG on Reddit: Q Fan Default settings or optimise all?

July 3, 2021 -

Hi all! I've recently moved to b550 f gaming and I see the option Q Fan. And I was wondering should I just leave this option as it is as default settings or should I go into q Fan tab and click optimise all and then save the settings ?

Does clicking on 'optomise all' make any difference in performance ?

Which option is better ?

Top answer

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Do you meant the Qfan Tuning? I would recommend doing the tuning as it allows the BIOS to determine the range of speeds that your fans are capable of. Once tuned, whatever preset you choose will be more accurate with fan speeds.

2 of 2

I was wondering this same thing I just updated my bios. Bad part is some of my fans are hooked up directly to the power supply guy on YouTube said that’ll just have them running at full speed all the time

Linus Tech Tips

linustechtips.com › computer hardware › cpus, motherboards, and memory

Asus Q-Fan control problem - CPUs, Motherboards, and Memory - Linus Tech Tips

January 24, 2023 - Hello everyone! My chassis fan 1 minimum duty cycle is at 60% while chassis fan 2 is 20. I would like to make my pc quieter by creating a new fan curve but I can't go under 60%. I have tried optimizing all and that didn't help.

reddit.com › r/buildapc › asus q-fan control question!

r/buildapc on Reddit: Asus Q-Fan Control Question!

January 7, 2019 -

Hi all,

I'm using 6 120mm xspc rgb fans connected through a 12v xspc 4-pin pwm hub. The hub then connects to chassis 2 fan header on an asus z390-e motherboard. The fans are rated for 800-2200 rpm. When I set the fan curve to the very minimum speed (20% i think), for some reason the fans start at 1240 rpm... I was confused at how it started at this speed but after some guessing I figured its 800rpm+(20% of 2200) which comes to 1240 rpm. Is there a way to set the minimum speed at 800?

Thank you so much and please let me know if I need to clarify on anything!

Top answer

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Set the minimum percentage to 0? Based on what you've already found (20% going to 20% of max duty cycle) then it seems to me that setting it to 0 should set it the the fans minimum duty cycle.

2 of 2

Percentage and fan speed cannot be calculated. Every fan responds to PWM signal in their own way. Even if their speed range was identical, one can run 1200 @ 20% and the other 1200 @ 40%. You can try DC control but that might dim the leds.

Overclock.net

overclock.net › home › forums › intel › intel motherboards

Asus q-fan not controlling fan speed | Overclock.net

(please don't suggest using a manual fan controller, I want the motherboard to be on top of it so I don't have to be) Here's a screenshot of how I have it configured: (and a side question that should be easy to answer: cpu-z shows 1.34 vcore and AI Suite shows 1.323V, which should I pay attention to?) ... When in the Qfan menu in BIOS, look to see what key loads "optimized defaults for this page" That has worked for me in the past.

Tom's Hardware Forum

forums.tomshardware.com › home › systems

Qfan/Cpu Fan Speed | Tom's Hardware Forum

May 6, 2018 - Hello, I recently used the "Optimize All" Option in Asus Bios for Qfan the Fans used to Run at 2000 Rpm+ The whole time on Standard, but after i Activated the Optimize All it switched to Manual and a New Load curve was made Automatically. the fans now when i am not working are off , but whenever ...

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reddit.com › r/techsupport › gpu higher temps after using asus qfan optimize all setting and switching back

r/techsupport on Reddit: GPU higher temps after using asus qfan optimize all setting and switching back

August 4, 2021 -

So I was tweaking fan curves when I decided to use the "optimize all" option the bios had available, I did this twice (because after the first time I tweaked the "manual" setting without knowing that the optimized fan curve was implanted there) which caused almost all my fans to fully stop for several seconds, and then spin back up to reach 40 c idle for cpu both times.

I didn't really like these settings, and while it was more quiet, I would rather not have higher temps so I put it back to where I had it before.

However, I noticed that even when playing cpu bound games, the gpu usage would be considerably higher than what it normally was before the optimization process, and so was the temp, which stayed at a consistent 50 c on old games like tf2, 10 degrees higher than what it normally was before.

Thing is, the cpu temps stayed pretty much exactly the same.

TLDR: all I want to know is if I've damaged my gpu by using the fan optimization in bios which stopped my fans for almost a couple seconds twice in a row.

cpu: ryzen 5 5600x

mb: rog strix b550-f gaming

gpu: sapphire nitro+ amd radeon rx6700 xt

case: lian li lancool 2

Top answer

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If your case fans are running slower because of "optimized" settings they will by nature move less air and cause more heat buildup in your case.

Asus

rog-forum.asus.com › t5 › z170 › m8h-q-fan-control-not-working-properly-with-3504-bios › td-p › 721403

M8H Q-Fan Control not working properly with 3504 B... - Republic of Gamers Forum - 721403

March 6, 2024 - Hello guys. Today i successfully flashed the 3504 BIOS and everything works well except for the Q-Fan Control. It does not allow me to customize my own fan curve. For example: these are the settings i used to have on 2202 BIOS (DC mode) But on 3504 i cant get any lower than 60% by "CPU Fan Min....

reddit.com › r/techsupport › i accidently changed my q-fan settings in my bios and now my temps have jumped up? can anyone help me get them back to normal? i dont know if i have disabled some fans or maybe something else.

r/techsupport on Reddit: I accidently changed my Q-Fan settings in my bios and now my temps have jumped up? Can anyone help me get them back to normal? I dont know if I have disabled some fans or maybe something else.

June 28, 2020 -

It's a pre-built gaming PC so not sure if the company had set certain fan speeds/curves before delivering.

Here is a HWMonitor screenshot

https://imgur.com/a/VrdtAPp

Top answer

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How did you change the settings/what happened ? Q-Fan is just a dynamic fan adjustment. So if your system is running hot the fans go harder, and it it's running cooler they go slower.

The company would likely have had their own settings. If you want to match them then calling their tech support is best. They should be able to tell you or provide you the settngs they shipped your machine with.

If they can't do that, you could just turn Q-Fan off and see what happens. It will probably be louder and slightly less efficient on power but you won't destroy anything. From there you can see which adjustments work better for you.

Dannyda

dannyda.com › home › how to fix asus q-fan control can’t change to under/lower than 20% speed & asus motherbaord/q-fan reporting incorrect rpm for pwm/dc fans

How to Fix Asus Q-Fan control can't change to under/lower than 20% speed & Asus motherbaord/Q-Fan reporting incorrect RPM for PWM/DC fans < Blog-D without Nonsense

September 16, 2022 - By default, Q-Fan control can only allow us change the fan speed to 20% at minimum, we can’t go lower than 20% at all even on manual settings (Note: The hardware – Fan in this case must support the speed, if the supported lowest speed is 20%, then we won’t be able to do anything)

Linus Tech Tips

linustechtips.com › computer hardware › cpus, motherboards, and memory

Q-Fan Control Reccomendations? - CPUs, Motherboards, and Memory - Linus Tech Tips

April 9, 2021 - Hello, so I just built my first PC and was playing around with some settings to optimize performance and all of that. I have a 3700x with a ASUS ROG Strix B550-F (Wifi), with idle temps around 38 to 45C. I wanted to know if I should leave it at boost mode or if this more aggressive custom fan cur...

reddit.com › r/buildapc › should you use q-fan control optimize on a new build in the bios or should you use another fan app or just ignore at stock?

r/buildapc on Reddit: Should you use Q-Fan Control optimize on a new build in the bios or should you use another FAN App or just ignore at stock?

April 25, 2025 -

Hey Everyone,

Finished a new build, curious but are we supposed to use ASUS Q-Fan control and hit "Optimize" in the BIOS or is it better to ignore as the board has AI that will handle it? Or should I leave it alone and use a trusted fan control app if needed?

The board is the ASUS B850-F and a Ryzen 9950x3d w/ a Noctua DH-15 G2 cooler in a ASUS ProArt PA602 case.

Some threads said you should so the system can understand the max speed the fans can hit - is this true?

Sorry its been 9 years since I built a new pc - unsure atm :/
Also - is it better to do fan optimization in the morning after the pc has been off for the night to get a better read or does it not matter?

Top answer

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I am just learning this too. some thoughts. What is your goal? Do you want maximum performance? Do you want something that won't heat up your small office too much this summer? Do you want a quiet pc to play movies in your home theater? I would work with fan curves with the PC fully warmed up as that's when it'll be most important that they are effective. As far as fan curves, it comes down to how must you enjoy fussing with your computer. You can use the tools in the BIOS to keep things simple. Play with all the settings in the overclocking wizard. You should download a program to stress test the GPU and CPU. Let AI set the fan curves, record the numbers. Then set them yourself see if there is an improvement in the stress test. It could potentially take a whole lot of back and forth, changing the fan curves, run a test, record the numbers. Then go back over the numbers and set it back to what was best for your needs.

Overclockers

overclockers.com › home › forums › hardware › motherboards › amd motherboards

QFAN manual control broken? (BIOS 801) | Overclockers Forums

December 20, 2017 - For one thing, when I select manual, the draggable curve points don't seem to work properly and only allow limited movement. I simply want to reduce the fan speeds at idle from 20% to something like maybe 5%. I am using PWM. If I choose 'Optimize All' it even sets the minimum fan speed to 60% or more at idle! And at one point when adjusting manual curves my screen froze requiring a hard reboot. Ouch! Have these issues been fixed in 804? ... Not sure what you mean.

Asus

rog-forum.asus.com › t5 › z170 › maximus-viii-hero-alpha-qfan-fan-control-not-working-properly › td-p › 671842

Maximus VIII Hero Alpha Qfan/fan control not working properly

March 6, 2024 - Upon running an optimisation, I hear the fans ramping up and slowing down, but it always sets the min cycle at 100. It's only when using the Silent, Standard or Turbo presets that it stops sitting at 100%. I have monitored the fan on desktop during stress testing and the RPM does ramp up in accordance with the Turbo preset, so that functions correctly at least. ... I've fixed it. I reflashed the bios and ran Qfan optimisation, it set min duty to 100% and no amount of tweaking let me change it.

Toolify

toolify.ai › ai-news › optimize-your-pc-cooling-control-case-cpu-fans-with-asus-motherboards-95160

Optimize Your PC Cooling: Control Case & CPU Fans with ASUS Motherboards

December 26, 2023 - A: To optimize fan settings in the system BIOS, enter the BIOS by pressing the delete key during system boot. Navigate to the Q Fan Control section, configure individual fans, and click on "Optimize All" to find the high and low spots for all fans.

Tom's Hardware Forum

forums.tomshardware.com › home › cooling

[SOLVED] - Asus mobo Qfan control | Tom's Hardware Forum

August 9, 2019 - Each can be configured separately, and they are the ones you should use for case ventilation fans. The AIO_PUMP and W_PUMP+ headers are intended to power only the pump unit of a liquid-filled CPU cooling system, and so they do NOT generally allow you to control their speeds at all - they are supposed to run the pump at full speed all the time.

Asus

rog-forum.asus.com › t5 › rog-desktops › q-fan-control-optimal-settings-for-4790-k-4460and-others › td-p › 525132

Q-Fan Control - optimal settings for 4790(K) / 446... - Republic of Gamers Forum - 525132

March 6, 2024 - Intel Extreme Tuning Utility BIOS does not offer ANY CPU / RAM modifications at all. ... Paul.Jandali wrote: Hi there ! I´ve put a 4790K into my G20AJ, downclocked to 4Ghz, undervolted ~ -70mV, which seems to be stable. (Turbo Boost Short disabled) (Intel Extreme Tuning Utility) I´ve xperimented a lot with the Q-Fan Control settings in BIOS. Here are my actual values (for both fans): 20C -- 15% 55C -- 30% 70C -- 70% As a result fan speed is about 27% in regular working ...

reddit.com › r/asus › hello, i’m trying to enable q fan control but it’s not showing up. i don’t have anything that resembles a fan control on my bios. any ideas?

r/ASUS on Reddit: Hello, I’m trying to enable q fan control but it’s not showing up. I don’t have anything that resembles a fan control on my bios. Any ideas?

January 24, 2022 - And yea when I click on advanced mode there’s still no fan option ... Under your power tab move cursor down to Q fan control and hit the + key to enable Q fan controls, F10 save and exit.