Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: looking to disable cpu fan but mobo keeps giving me warnings

13 Sep 2011   #1

Windows 7 Ultimate x64
looking to disable cpu fan but mobo keeps giving me warnings

I have a HTPC which includes an ASUS mobo/cpu combo (fanless, smart BIOS, etc). The case is mini ITX with a single case fan. As it is this machine runs really cool since I have no moving parts other than the storage HDD (OS is on SDD).
What I ended up doing was move the case fan power plug to the "Chassis1" fan header on the mobo because the BIOS offers more tunability controls for chassis fans than it does the "CPU" fan header.
Problem is now, I get popup alerts in my sys tray from the BIOS manager that CPU FAN IS DISABLED or NOT OPERATING.

Is there a way I can jumper this power header out with a resistor or something to fake the mobo into thinking it's driving a fan?

What value resistor should I use? or is this not recommended?
Eventually I'd like to disable all the fans because I dont think this HTPC runs very warm at all.

My System SpecsSystem Spec
13 Sep 2011   #2

Microsoft Community Contributor Award Recipient


not recommended
My System SpecsSystem Spec
13 Sep 2011   #3

Windows 7 Ultimate x64

Mmkay, thanks. Care to elaborate at all?
My System SpecsSystem Spec

13 Sep 2011   #4

Microsoft Community Contributor Award Recipient


NO FAN the CPU will overheat & You will buying new CPU.
My System SpecsSystem Spec
13 Sep 2011   #5

Windows 7 Ultimate x64

As I stated in my first post, the cpu doesn't have a fan:

These motherboards in the proper case are intended to run completely fanless. As in NO NOISE. I have the case fan running but it's plugged into the CHASSIS_1 header, which leaves nothing on the CPU_FAN header. I want to jumper this header out so I don't get the bios warning.
My System SpecsSystem Spec
13 Sep 2011   #6

Windows 7 Ultimate N 64-bit

u should have an option within bios to diable warnings/alarms have u checked?
My System SpecsSystem Spec
13 Sep 2011   #7
Lava King

Windows 7 Home Premium x64

Hi 211,

A resistor won't do the job for you, the fan controller is expecting a pulse train, not a steady DC voltage.

I'm not familiar with your particular motherboard, but I have seen other boards that had an option in the BIOS to disable CPU fan warnings.

Can't think of any viable ways to "fool" the BIOS into thinking that there is a fan attached.

BTW - your user name makes me think of the TV series Adam-12 from many years ago. Radio: "2-11 in progress, 1-Adam-12 handle code 3."
My System SpecsSystem Spec
13 Sep 2011   #8

Windows 7 Enterprise X64/Windows 10 Enterprise X64/Windows 10 Pro X64/Linux Mint

I'm not familar with your mobo at all. But if it was intended to be run with a fanless CPU cooler, they must have offered a solution to stop the pop-ups, probably found in bios. Failing that, connect the case fan to the CPU fan header and you shouldn't get the warning.
My System SpecsSystem Spec
14 Sep 2011   #9

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

You could use an adjustable speed case fan and plug that into the CPU header. You could switch it to stay on the lowest speed. There are also temperature controlled variable speed case fans too.

An example: - Antec 761345-75120-9 120mm Case Fan
My System SpecsSystem Spec
14 Sep 2011   #10

Windows 7 Ultimate x64 SP1

Use the proper fan headers, and run something like Speedfan to control your other fans, if that's what you are after.
My System SpecsSystem Spec

 looking to disable cpu fan but mobo keeps giving me warnings

Thread Tools

Similar help and support threads
Thread Forum
Disable security warnings when opening shortcuts
This has been annoying me to death since i first installed windows 7 Next to the start button, I have created a custom bar with a lot of shortcuts to open programs. But every time i click on a shortcut it gives me a security warning and ask me if i really want to open the file. I have to click...
System Security
Reinstall, had to disable UEFI. Driver warnings, yet everything works
Hi. Six months ago, I built this PC using a new SSD for the OS and two old HDDs for storage. ASUS mobo and Intel processor. The OS installation didn't cause any problems. Due to constant BSODs last week, I decided to reinstall the OS. At the 'Where do you want to install Windows' screen I had...
Installation & Setup
Unable to disable Secure Boot in Windows 7 (New MOBO)
Hello. I recently bought an Asus P8B75-M LE along with an MSI GTX 660 Ti OC V1 and an i5 (My OS is Windows 7 Home Premium 64bit). Every time i start the computer i get this message: "The current BIOS setting do not fully support the boot device. Click OK to enter BIOS Setup" and a yellow text: "Go...
Installation & Setup
Mobo not detecting HDMI? - ATI Radeon HD 4250 onboard ASUS mobo
This problem has the configuration listed in my system specs below, which have just changed recently. My OCZ Vertex 2 died, RMA'ed but sold, and replaced with the Transcend SSD720, 2.5" SATAIII 64GB. Also sold my GPU... :cry: Now, trying to get everything back on track. I reinstalled my OS on...
Hardware & Devices
How do I disable registry editor warnings
I recently created a start up shortcut file that edits one aspect of the registry. Now when I start my computer it warns me of my start up file and asks me to agree to let it it run. Is there a way to prevent these warnings from showing up. .
How do I disable these annoying security warnings (build 7068)
Hi all anyway to sto these messages popping up on previous builds there was a little box you could uncheck. This gets really annoying if you are accessing any site with partially protected conted - https stuff etc. Cheers jimbo
Network & Sharing

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 10:44.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App