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Windows 7: CPU Fan Stops Spinning After Windows 7 Boots


04 Jul 2012   #1

Windows 7 Home Premium 64bit
 
 
CPU Fan Stops Spinning After Windows 7 Boots

I built a computer, and I am using a Core™ i5-3570K Processor w/ Gigabyte GA-Z77-D3H Motherboard, and I am using the stock CPU Fan (that comes with the Processor), I noticed that the CPU Fan only spins when the computer is booting, then stops spinning when it has finished booting (when windows has fully loaded). When I go into my BIOS Settings, the CPU Fan still spins. But when it boots Windows, it suddenly stops. I have tried unplugging my CPU Fan from the motherboard and plugging it in again, but that doesn't seem to fix it. It is in the correct socket... does anyone know how to fix this? I'm quite sure it's a BIOS Settings Issue (please let me know if it is not), if it is how to do I fix it from the BIOS?

My System SpecsSystem Spec
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04 Jul 2012   #2

Windows 7 Home Premium 64bit
 
 

Can anyone help?
My System SpecsSystem Spec
04 Jul 2012   #3

Microsoft Community Contributor Award Recipient

Windows 7 SP1, Home Premium, 64-bit
 
 

How do you know it is not spinning?

By eyesight?

By ear?

By reading RPM from a program of some kind?

If it were not spinning, I'd expect the PC to shut down pretty quickly due to heat issues.
My System SpecsSystem Spec
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04 Jul 2012   #4

Windows 7 Home Premium 64bit
 
 

By eye, I have opened the case because the computer was freezing and I wanted to see what was causing it. So I noticed the CPU Fan stops spinning when Windows 7 has fully booted (around 5 seconds after I can see the desktop).
My System SpecsSystem Spec
04 Jul 2012   #5

Windows 7 Home Premium 64bit
 
 

Also, when I booted in safe mode, the fan was still spinning.
My System SpecsSystem Spec
04 Jul 2012   #6

Microsoft Community Contributor Award Recipient

Windows 7 SP1, Home Premium, 64-bit
 
 

I assume you cannot get to a fully booted Windows and operate normally?

Did this fan EVER operate properly on this motherboard with this Windows installation?

Have you reset the BIOS to defaults?
My System SpecsSystem Spec
04 Jul 2012   #7

Windows 7 Home Premium 64bit
 
 

Windows 7 does operate normally. Until it freezes... but, how can I reset my BIOS settings? I know it's a dumb question... but I have never used the GIGABYTE BIOS before.
My System SpecsSystem Spec
04 Jul 2012   #8

Windows 7 Home Premium 64bit
 
 

And this is a brand new build, 2-days ago. So, I'm quite sure it never operated properly. Also, if you think a part is defective please let me know which one you think it is.
My System SpecsSystem Spec
04 Jul 2012   #9

Microsoft Community Contributor Award Recipient

Windows 7 SP1, Home Premium, 64-bit
 
 

You should be able to enter the Gigabyte BIOS by holding down the delete key while booting.

Then look for "load optimized defaults" or "load failsafe defaults" or something similar. Save and exit.

It may not help.

Have you knowingly made any changes in the BIOS?

You built it 2 days ago. Were you able to get to a desktop without freezing and do some normal stuff at that time? If so, I'd assume the fan was spinning. Intels are supposed to shut down before heat damage can occur, but I'm not sure if they can operate at a light load without a fan without reaching critical heat levels and shutting down.

Is that fan a 4 pin fan and does the CPU fan header have 4 pins? I assume the fan connector cannot be installed onto those 4 pins in any other fashion, such as rotated 180 degrees?
My System SpecsSystem Spec
04 Jul 2012   #10

Windows 7 Home Premium 64bit
 
 

It's a 4-pin fan. I will try resetting my BIOS.
My System SpecsSystem Spec
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 CPU Fan Stops Spinning After Windows 7 Boots




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