Monitor your computer’s fan speed with SpeedFan
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Some noise from inside your PC’s cabinet. Probably your computer’s fan is not performing well.
SpeedFan is a very useful tool that might come in handy when you need to know your computer’s fan speed and temperatures of your motherboard or hard disk. In addition to this, this software will also be able to analyze your hard drive’s status and provide you with details on its performance using SMART or even SCSI. Fool proof your hard disk from a crash.
With SpeedFan, you’ll be able to monitor and control your computer’s fan speeds, detect irregular power supply, and also oversee voltages. It does this by accessing your PC’s temperature sensors. SpeedFan is the right tool if you’re worried about fan noise.

What more - it can alter and adjust your the speed of your fans (this depends on the hardware, though) - reducing noise.
It’s highly configurable, but be careful not to mess up with the settings because a wrong move can result in total system damage.
You can download SpeedFan from here.
What are your views on this software? Did you find this useful?
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I was using this long time ago … Nice software to monitor the system temperatures.
I dont use it to monitor fan speed. But, I use it to monitor temperature.
Thanks for sharing your views, Manas and Pallab.
Good point actually. But I never worried about the fan speed…
I always worry about the temperature
actually.
if you are using intel motherboard there is a freeware utility for download on the intel support site ,known as intel active montior , you can use that also..
Thanks Shashank for the info
It doesnt seem to work with my mboard .
looks gud…lemme chk how efective it is.