Tip & How-To about Computers & Internet

CPU Fan Speed high

What Could be happening inside when you hear the cpu fan running at a high speed always ?

Ever thought about it ? Ok let me give you a clue on this. To understand this issue you need to understand how the hardware works on various situations.

Check the Heat settings in bios and look for the variance.

Bios can instruct a CPU fan to run faster only when there are critical lssues of heating.

The CPU starts running on a realtime 16bit more known as SMM mode.

This is a feature which is inbuilt to support the continuous performance of the Processor even while temperature level rises.

The instruction is moved through the Bios, and can be a bios related issue.

Worst case, Flash the Bios once for all and the issue will be solved.

If its a very old system flashing the bios could be also a problem, still you can seek the help of a Hardware Engineer to get this accomplished.

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1 Answer

why is the cpu fan always off on my dinension E510

Fan defective
Fan not plugged into proper connector
Computer not warm enough to run fan at high enough speed to hear.

Jul 03, 2014 | Dell (W2562) Motherboard

1 Answer

fan runs at very high speed


OK, firstly, if the CPU fan runs at high revolutions, it means that the CPU is very hot. The more heat on the CPU, the faster the fan will run in order to keep the CPU at the safe temp.

Hence, you will have to open up the case and have a look if the CPU fan housing is clogged with dust particles, this is usually the most common cause for the CPU to overheat. If you can see that there is a lot of use stuck to the fan, you will need to blow if off, i use a compressed air cylinder, it works great.

If there is no dust particles visible, you will need to put some new thermal paste on the CPU chip itself.

Try the first option, let me know what happens.

Kind regards

Aug 13, 2010 | HP Desktop Computers - Hewlett-Packard...

2 Answers

is my cpu getting to hot my cpu fan runs in high speed a lot. do i need a bigger fan or my cpu is going bad.


Turn the computer off.
If it is a HP laptop, remove the battery.
Disconnect the AC power.

Buy a can of compressed air, and give your computer a "blow-job",
to blow all the dust away from the heat-sink on top of the CPU,
and also, if it is a desktop, from inside the power-supply.

A layer of dust is a layer of insulation, preventing the heat-sink on top of the CPU from "radiating" the heat away from the CPU. So, your motherboard is detecting that your CPU is "too hot", and automatically speeds-up the cooling fan, to try to move the heat.

Nov 17, 2009 | Office Equipment & Supplies

1 Answer

Toshiba 4010 is giving me a "warning, problem with the cooling system message" Machine gets real slow. How can I inhibit this message, I have it on a cooling pad?

The electrical components in a PC generate heat, and fans inside the PC help move the air to keep the components from getting too hot. Excess heat will cause the fans to run constantly, damage components, and limit the speed of the CPU. All of these problems with high power and high heat will cause applications to work slower than normal. One of the main functions of the BIOS is to monitor the temperature and adjust the operating conditions. While the sound of the fan running all the time can be annoying, it may the first clue that your PC is running as efficiently as possible. To help your PC as cool and as efficiently as possible, do one or more of the following corrective actions.
  1. Update the BIOS
  2. Keep air vents clear and clean
  3. Minimize disk operation
  4. Minimize CPU operations
  5. Check whether FAN is enabled in BIOS
Thanks Rajesh

Jul 13, 2008 | Toshiba Computers & Internet

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