How to fix "CPU Fan not detected" errors and warnings
ฝัง
- เผยแพร่เมื่อ 6 ก.ค. 2023
- In this video I'm talking about what to do if you've built a PC but then you can't install Windows or you can't boot your machine because of a warning about the CPU fan speed not being detected.
This is often a simple fix luckily. If you've installed an all-in-one CPU cooler, then chances are you connected the pump head to the AIO pump header on the motherboard. This leaves the CPU Fan header empty, which some motherboards don't appreciate! So the solution is either:
1 - unplug the AIO pump cable and connect it to the CPU fan header instead
2 - head into your BIOS settings and set the CPU fan monitor to "ignore"
Either of these options will work and should solve your problem.
Here are some other videos you might find useful:
Common Mistakes You Might be Making with Your PC Fan Setup! PC airflow tips and tricks • Common Fan Layout Mist...
Are you making these mistakes with your RAM? • Common RAM Mistakes Yo...
Avoid these problems with your all in one CPU cooler • Avoid These Common All...
Don't make these mistakes with your NVMe SSD installation - NVMe tips and tricks • Don't make these mista...
Where should you put your AIO radiator? • Where should you insta...
How to choose the right PSU (which Power Supply Unit you need and how to install it) • How to choose the righ...
Push Pull mistakes to avoid with all in one coolers • Push Pull mistakes to ...
Disclosure: Shopping links within the description of this video generate a commission at no extra cost to you. These are added for your convenience but other retailers are available. As an Amazon Associate I earn from qualifying purchases.
Products:
Products featured may also have been sent for free for review/testing purposes. Often these have to be returned by me, but not always. I endeavour to avoid bias in my videos wherever possible and try to give honest, subjective opinions. Unless otherwise stated, the videos are not sponsored financially.
🏆Big thanks to my super awesome TH-cam members:
SirSpawnsALot, Meatykeyboard, Rawrr483, Aaron Yarden, Space Cannons, Riggs79, Mike S, Jay Shank 007, Jason Morgan, Starastin, Charles Latrom, McFarty, Chief Hao, Kraken Tortoise, Chris Thompson, Dazed Bengone and Megan Schafer.
Want to send me things for videos or other reasons? Use this address:
The Provoked Prawn
PO Box 13277
MANNINGTREE
CO11 9BE
United Kingdom
🔫Sub to my gaming channel🔫 / @theprovokedprawnpews
Come check me out on Twitch - / provokedprawn
Join my Discord to keep up to date or ask questions / discord
Follow on Reddit / theprovokedprawn
Read this far? You're awesome. Smash those sub and like buttons!
📌 Support the channel:
😍 See the benefits of being a member here - / @theprovokedprawn
Get some merch - theprovokedprawn.com/
Check out my dedicated Amazon Storefront to see my current fave gear - www.amazon.com/shop/theprovok...
📸 Recorded with amzn.to/3kYrhGP - เกม
Here are some other videos you might find useful:
Common Mistakes You Might be Making with Your PC Fan Setup! PC airflow tips and tricks th-cam.com/video/uPIMv30Vs3w/w-d-xo.html
Are you making these mistakes with your RAM? th-cam.com/video/ZeUgMODOfOo/w-d-xo.html
Avoid these problems with your all in one CPU cooler th-cam.com/video/nVkN8diBIAE/w-d-xo.html
Don't make these mistakes with your NVMe SSD installation - NVMe tips and tricks th-cam.com/video/zjSn64vh_Vk/w-d-xo.html
Where should you put your AIO radiator? th-cam.com/video/qQcyYHGtArs/w-d-xo.html
How to choose the right PSU (which Power Supply Unit you need and how to install it) th-cam.com/video/dNseVxqqar0/w-d-xo.html
Push Pull mistakes to avoid with all in one coolers th-cam.com/video/_gA71wF9Ewc/w-d-xo.html
Where to connect PC case cables, power cables and more - computer wiring tips th-cam.com/video/xT36IDSQBX4/w-d-xo.html
i had no relation to the video except for you reminding me to switch 2 cords around so thank you
saved me a lot of hours
THIS was EXACTLY what I was looking for! I just built a new PC with this AiO and got that error message! Really silly and strange that MB's theese days can't understand when an AiO is connected to the pump header and then disable the need of something plugged into the CPU-fan...
Anyway, thanks a lot for this vid!
Glad to help!
This video can save us hours of troubleshoting the problem !
Hopefully a quick fix for many that are frustrated after building their pc. If nothing else 👍
I recently installed a h100i aio and that warning showed up so i switch it from aio pump to cpu fan and it worked for me. Thank you, this video was actually very helpful
🦐👍
How do you switch that?
I have the same one and the same problem
Thank you! First hurdle in my first build in 15 years!
Glad to help. Hope you are enjoying it
THANK YOU!
I’ve been trying to fix something wrong with my PC, and finally a video that actually makes sense and works! Thank you so much!
Glad it helped!
Any advice for if the fan isn't showing in the bios at all. I replaced the fan in the end with thermal paste thinking it could be an issue with the fan but it's sadly not been the issue
Such a simple fix! Thank you, had me panicking at first 😄
Thanks! What a simple fix. Your the best! Your vids also helped me to install my Lian Li Infinity fans...You made it so much easier.
Glad I could help!
What did you do exactly?
I have a Lian Li ALC 360. The lights on the pump come on, but the fans do not nor does it recognize the CPU Fan or the Pump in the BIOS. It does however stay at about 37 degrees. No recognition of coolant fans at all. My only issue with this new build.
@@FLYHIGH-yf6hr how did you end up fixing the issue? I have been using my computer for 6 months and suddenly I have this issue. It won’t recognize the fan speed or pump.
I put my input into AIO pump. My question Is it better to put it to AIO Pump instead of cpu fan!!????
I have this happen with the Corsair h100i and every blue moon or so my motherboard doesnt detect it and give me cpu error. Turn of psu and reboot a few times and works lol what?
I put cpu fan on ignore but when I save and reset it resets and goes right back to bios, if it makes anything different I have a custom pc
I still have a problem when ignore CPU it goes to blue screen?
Had the same issue with a prebuilt. Support replaced twice the fan until I've just seen your video lol.
Hi, need help please. I just bought Lian Li LCD 360 AiO (non Sl-inf), very good cooling in Cinebench R23, 37042 points in Intel stock limit on 13900K. The problem is that Z790 Hero's bios detects my aio fan speed, but in the Lian Li L-Conect3 app, it doesn't. The rpm reported by the app is 0 even though the fans are actually spinning. I reinstalled W11 64, drivers, app, bios change to ignore and back. Any suggestions? Tanks
i have an lian li galahad ii trinity aio, i connect the pump to aio pump connector and on the controller i have another connect wich i connect to cpu fan, but i still get this error, someone can help?
Brilliant video i was stuck for a while now and u acc helped me out I appreciate u so much dude ❤
I have a CPU fan port and AIO pump is that an issue?
Hab auch ein problem. CPU Fan Speed detection error. habe auch den fan speed lower limit auf ignore gesetzt aber es kommt immer wieder. :(
how can i do it in h410m s2h v3 please ?
Thank you so much man you helped me alot with this problem. I was dealing with it for days until i fount this video
Glad to be of assistance
it's weird mine doesn't working it's just same , usually my fan make noises when playing game now it's gone and my game so slow
I don't know what to do anymore, I installed new fans to the AIO cooler and others too, none of them work I've tried it all different connections reinstalled cpu, PSU everything. Old fans work as if nothing is wrong but when I connect them they won't spin nothing no RGB, I'm honestly out of options at this point. It's 6 of them all the same model 4 120mm and 2 140mm. I don't know what to do anymore
I got this error but when I check it shows the cpu fan speed is detected and shows the rpms 😭??
thank you! very helpful! 😁
This not working for me it still goes to high speed and cuts off
Thank you, I just built my first PC and this warning had me worried
Glad to help!
Thank you for the video!
what if i cant open bios and there are three problems like cpu overheat problem and usb over current device and cpu fan not detected error what should i do i spenc one hour looking for answers
Sounds like your CPU cooler isn't installed correctly. Check the connections, reseat it and check the thermal paste etc
You are the best , you save me. What a great Video. Helpful. Thank u so much.
Glad to help. Return the favour by subscribing
my cpu temp is averaging around 78°c, i have the same detection error, i switched the cable to the cpu fan, and it still shows up. my pc keeps randomly shutting off as well, could it be due to the error plus cpu temp? everything else runs just fine, i could install windows 11 no problem although i did get a system32 error, ive ever since reset my pc and left it alone. i own an rog strix b650e-f ryzen 7 series, and i own corsair h150i elite cappelix fans
Try this th-cam.com/video/sVEXd-Wp8FY/w-d-xo.html and this th-cam.com/video/nVkN8diBIAE/w-d-xo.html
I only have one of two aio fans spinning and I get this message aswell, I did change in bios to ignore the warning but like I said there's only one fan spinning, is it broken?
You've probably connected them incorrectly
I'm having this error with my Lian Li Uni SL120 V1 fans connected to a Corsair H150i LCD AIO. I have the AIO Pump able plugged into my Motherboards (ASUS B650 E-E) AIO Pump header and then I also have the Lian Li controllers 4 pin PWM cable plugged into Motherboards CPU_FAN Header. I still get this error and don't know why as there is a PWM cable plugged in. Any idea why?
Maybe if you've not turned motherboard sync on in the L Connect software? I'd just set it to ignore tbh
@@TheProvokedPrawn Ok, I don't know what I'm doing wrong here because I've tried everything at this point. I'm running an AMD 7900x with a 360mm corsair AIO, front mounted with 6 SL120 fans in an intake position. I have 3 SL120 fans on top as exhaust and 1 more SL120 on the back also as exhaust. My GPU is a 4080 and all of this is in a corsair 5000d airflow. For some reason my CPU is idle at ~85 degrees which is way too high for idle. Everything is secure and thermal paste was applied correctly. Other than my previous comment, any idea why this is being such a pain?
God bless all your videos! Can I ask though, i have my aio fans plugged into CPU fan, and the aio pimp plugged into aio pump. So, if I follow u correctly, you’re saying to plug the aio pump into CPU fans instead. What do I do with the aio fans connector in this scenario?
If you're already plugged in like that then you shouldn't even be getting the error. It's usually because CPU fan isn't populated. Anyway the easiest solution is turning off the speed monitoring in the bios
@@TheProvokedPrawn I cant enter the bios any solution for that :\
Welp here is something that might work that helped me. Not sure what setting I hit, but I did something. Anyway to fix the problem for me. When in the bios and you see the cpu fan, it should show it kick on for a couple seconds than turn off. You just hit f10 when the fan shows its on. That is if you manage to see the fan kick on and off in the bios. (Witch I’m assuming you will see it if your fan isn’t the problem) If it’s not running at all than idk
My AIO pump its not showing in BIOS , why??? and also the LED its not ON , i check all day long, please help , i have a motherboard B650-A and a Corsair H150i Elite Aio
th-cam.com/video/XahzpIZFyrM/w-d-xo.html
It dosent work for me can someone help me pls
my issue is it does not detect my AIO Pump it says N/A where the pump speed should be
I’m having the same issue:
What did you do exactly?
I have a Lian Li ALC 360 Coolant System and a Gigabyte B650 X AX V2 Motherboard. The lights on the pump come on, but the fans do not nor does it recognize the CPU Fan or the Pump in the BIOS. It does however stay at about 37 degrees. No recognition of coolant fans at all. My only issue with this new build.
Saved my life with my new build
Glad to help
My problem is that it'll detect the fans but they're stuck at one speed and they're not responding to bios or fan control. So I'm stuck. I'll connections are good. Even have my cpu some fresh goop since it's been a year.
Have you fixed it?
Yea I have the same error
thanks bro! this solved my issue!
Glad I could help
If I go and boot, but fans dont spin, what happens then? Cant find anything enywhere to help...
I’m having the same issue:
What did you do exactly?
I have a Lian Li ALC 360 Coolant System and a Gigabyte B650 X AX V2 Motherboard. The lights on the pump come on, but the fans do not nor does it recognize the CPU Fan or the Pump in the BIOS. It does however stay at about 37 degrees. No recognition of coolant fans at all. My only issue with this new build.
Did u find a solution ?
@@FLYHIGH-yf6hrdid u find a solution
Ill give the cpu fan thing a try have it plugged on the mb that just says pump.
Ill update if it helps
Edit: Sweet my mbs labeling was weird and had to find a pin labeled system fan LCF tucked all the way in the corner
I cant seem to be able to enter bios can someone please help me?
Press del or f2 when rebooting
Thanks, helped!
You're welcome!
Thank youuuuuu!
You're welcome. Hope you enjoyed enough to subscribe 🦐
Here’s my issue:
I have no idea what to do at this point.
I have a Lian Li ALC 360 Coolant System and a Gigabyte B650 X AX V2 Motherboard (note: the Lian Li pump cable only has a 3 pin socket that still will fit on the 4 pin motherboard header. I have the pump plugged into the system pump 4 pin on the motherboard. I have the other cable of the two plugged into the CPU Fan Header on the mother Board. Nothing is plugged into the CPU_Opt. The lights on the pump come on, but the fans do not move nor does it recognize/detect the CPU Fan or the Pump in the BIOS. Both says N/A. It does however stay at about 37 degrees. No recognition of coolant fans at all. My only issue with this new build.
Does your cooler also have a sata power cable that connects to your PSU?
No, the cooler has two cables. One kind of has a split off that has the RGB 3 pin connector. That one is really a 4 pin with one of the middle blocked out.
The two man cables are the 3 pin, which is the pump cable I suppose.
The other is the CPU Fan cable which is a 4 Pin.
I have the 4 Pin plugged into the CPU Fan Header
I have the 3 Pin cable plugged into the 4 pin Fan 3 System Pump Header.
Non of my Motherboard Headers are AIO. The Fan3 System Pump Header is at the very bottom of the MB where as the CPU_Fan and CPU_Opt is at the top right of the MB.
Lian Li 216 V2 Case
Lian Li ALC Coolant System
Gigabyte B650 Gaming X AX V2 Motherboard
MSI 850 Gold PSU
R TUFF 7800 GRE GPU
Very smart man. Thank you for this video
You're welcome. Hope you appreciated enough to subscribe 🦐
@TheProvokedPrawn would appreciate it please if you could gimme your opinion on this because I bought a custom built computer and it worked fine booted/restarted without any issues, but when I decided to flash the bios to the newest update I got that error you showed on screen and doing what you did fixed it also not to mention yes cpu_aio pump rpm speed shows up in bios but do you have any idea why that error would happen and I'm assuming it's not a bad sign?
Updating the bios probably reset the settings to default. You'll probably want to check that XMP is on and resizable bar too th-cam.com/video/XHsDsa2ECBE/w-d-xo.html
@@TheProvokedPrawn Thank you anyways I fixed the issue by doing what you did and yes xmp and reziable bar is on too, but I guess ''ignore this thingy'' has to be set to ignore hopefully it's not an issue.
Thanks 🎉
You're welcome
The best channel for noobs! Thank you
😂
thank you it helped me too
Glad to be of service
Thank you ❤
you're welcome! Hope you enjoyed enough to sub!
Thank you🙂
You're welcome 😊
I love you, you saved me losing my shit
Thankyou
Tysm man
Welcome!
Thanks ❤
You're welcome 😊
thank you
You're welcome
Dude's vocals are one octane less than Ralph Ineson's.
Just remember if your using a corsair commander your going to get the boot message as no fans are connected to the motherboard.
The pump should still be.
Bruh after i do this i have blue screen 💔
Same, have you been able to fix it?
Tanks you
Welcome
Did not work.
Absolutely explained perfectly i guess i over thought things but ill tell you what subbed and liked cause ive been at this for a week and it never worked with any other vid i watched 😂 call me a bot ill tell you f u cause this guys legit as shit
One thing I noticed is two of my aio fan leds on a fan header shut off but I can care less cause this worked😊😊
I'm not saying you're wrong as this is precisely what the BIOS tells you to do, but I don't know when ignoring a problem has ever been the proper way of solving a problem lol. I just hope all is well afterwards.
Спасибо креветка😂😂
You're welcome
My AIO pump its not showing in BIOS , why??? and also the LED its not ON , i check all day long, please help , i have a motherboard B650-A and a Corsair H150i Elite Aio
Did you connect it to the fan hub. Make sure the cpu header is connected to the fan hub and the motherboard make sure the fanhub is connected to a usb 2.0 on ur motherboard