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: Variable fan speeds for no apparent reason

08 May 2013   #1
MadforitSteve

Windows 7 Ultimate x64
 
 
Variable fan speeds for no apparent reason

A few weeks ago I had to replace my CPU fan as it was starting to rattle really badly and I decided to change it before it failed completely.
Just before it started rattling, I noticed that it was also tending to run at a higher speed a lot more often than it normally did and I put it down to a worn fan and also gave the system a damn good clean out as well as the heat sink which I regularly clean anyway,
After installing the new fan everything was great, It was so quiet I had to check that it was actually working and the apps/odd old game that I play regularly which were the things that made it work hard stopped happening so I was very happy, But after about 2-3 weeks of doing everything I normally do on my pc the new fan started working at a faster speed when using these particular apps/games which didn't seem to make any sense to me.
I have checked the working temp of the CPU and most of the time it runs at it's ideal temp and sometimes slightly lower and it also doesn't seem to run any hotter even when the fan starts working harder.

I have done a lot of different scans and checks to try and find the problem but had no luck so far.

Could it be that the sensor's or fan controller may be malfunctioning ?, And if so, How would I go about fixing this problem ?.

If you can think of any other things that I can check I would be more than grateful for any help that you can give me.

I should also say that some days it does seem to be worse than others, and also the new fan that I am using is not the same as the original although I would say it is definately a better one than the stock OEM one.

I am also wondering whether the new fan could possibly be running in the wrong direrction and I have tried looking all over the net to find which way it should be working (sucking / blowing) on my system which is a HP Pavillion a6455.uk...From what I can tell it is sucking air in towards the heatsink but everything I have read has all told me that different computers use different methods.

Please help as this is driving me nuts.


My System SpecsSystem Spec
.
09 May 2013   #2
fezbombmatt

windows 7 home premium 64bit
 
 

What is controlling your fan speed? Your mobo? Or software like SpeedFan?
My System SpecsSystem Spec
09 May 2013   #3
MadforitSteve

Windows 7 Ultimate x64
 
 

The Mobo
My System SpecsSystem Spec
.

09 May 2013   #4
Dude

Windows 10 Pro X64
 
 

Check your bios and see if you have smart fan enabled
My System SpecsSystem Spec
09 May 2013   #5
Gary

Win 10 Pro 64
 
 

Usually the hooter the CPU gets , the faster the fan will go.
My System SpecsSystem Spec
09 May 2013   #6
Dude

Windows 10 Pro X64
 
 

Quote   Quote: Originally Posted by Gary View Post
Usually the hooter the CPU gets , the faster the fan will go.
Yes Gary that's right. And if he has speed step or whatever amd calls it enabled it will throttle
My System SpecsSystem Spec
15 May 2013   #7
MadforitSteve

Windows 7 Ultimate x64
 
 

Sorry to ask this seemingly dumb question could one of you guys try to find whether my CPU fan should suck air onto the heatsink or should it be sucking air away from the heatsink,,,I am asking as I have recently replaced the fan and the new fan is the same size but a lot more powerfull and to start with was spinning totally silently even when it did actually throttle/speed up which rarely haooed. Just lately when I play a certain old online game and also the odd app here and there and due to this I have check with process/performance monitor and everything is just running as normal and there doesn't seem to any high CPU usage that would maybe cerate heat and cause the fan to speed up.
The only reason I am not sure which way the air should be going is because it is a totally different fan as in the original one was plastic and cheap and the new one is in a metal casing. Im pretty sure i can't just flip the fan over as the Blade rotor would rub on the heatsing unless i used a few washers and then out it on..I know that I cannot just change the red and black wiring over to change the direction as I have been told that it wouldn't work as all fans are now manufactured so that they will only spin one way which is starting to make me think that I may have to get another fan if it is spinning in the wrong direction and I know they are cheap enough but I really can't afford it at the moment,
My System SpecsSystem Spec
15 May 2013   #8
Britton30
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

What kind of fan is it? Post a link, I've never seen one that the blades go outside of the frame. It should blow air into the fins. All PC fans I have seen exhaust to the side with the motor support on it, sucking from the open side.
What CPU cooler do you have?
My System SpecsSystem Spec
Reply

 Variable fan speeds for no apparent reason




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Ransom BSOD's for no apparent reason/each one is different
For no apparent reason PC suddenly started BSOD'ing about 4 mos ago. The initial 50 or so referenced ntoskrnl.exe+75bcv0 but there were others in between randomizing it so that could not lock it down. Did Memtest86 etc. Memory is fine, ran tests on HDD everything was fine. Done every single thing I...
BSOD Help and Support
Can't hear any sound for no apparent reason
Hi guys, My computer audio was working fine yesterday. I left it on throughout the night but now all of a sudden, I can't hear anything from it. I've checked a few common problems that may occur but to no avail. I've tried checking the: - Sound level sliders and mute settings (placed all on...
Sound & Audio
BSOD all the time for no apparent reason
Hi I have a custom built PC Windows 7 x 64bit which just keeps freezing after a few minutes of using it for no apparent reason. Error message here any help appreciated because when it works its a cracking little PC :D Thanks in advance to all you very cleaver people.
BSOD Help and Support
BSODs for no apparent reason
BCCode: deaddead BCP1: 000000000F010012 BCP2: 00000000001C0410 BCP3: 0000000012BC0000 BCP4: 0000000000000000 OS Version: 6_1_7601
BSOD Help and Support
HG Sharing not working for no apparent reason
I had a homegroup on my network, composed of one desktop computer and 4 laptops (I'll call them Desktop, H, D, M and K for clarity). For a few weeks, everything was working fine. However, today I was on K and it was for some reason unable to connect to any of the other computers. I ran the HG...
Network & Sharing
Virtualization broke for no apparent reason
Hey, Well, I'm stumped. I use VirtualBox to virtualize several different OSes for support and development purposes, and for some reason since my last reboot (of the host) they have all stopped working. All the machines now give the following error within seconds of booting: "An error has...
Virtualization


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 09:41.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App