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Cpu fan running at full speed

It started out of the blue yesterday, prior to that, it ran at slow/low speed. The fan goes to high speed on start up from cold, does not appear processor load related. CPU (4) temps range from low of 26C to high of 41C. Fan is constantly runnng around 4500 rpm - quite noisy.

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  • Gateway Master
  • 27,725 Answers

WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.

http://www.kitchentablecomputers.com/static.php - rules



Only work inside the computer case when the power has been switched off and disconnected. Never open the power source.



Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards

desktop or laptop computer fail to boot for a variety of reasons, but a fast, loud fan noise signifies that the system is suffering from overheating.


The problem, and the steps for troubleshooting it, is not unique to the Gateway Desktops.
When the internal temperature of the computer reaches too high a level, the system will shut down automatically to allow the heat to dissipate.


If you attempt to power up too soon, the machine will not boot properly.

To boot, you will need to correct the cause of the overheating, and keep the machine cool.


Blocked Vents


Although different in size, both desktop and laptop computers have air vents to help the fans keep air circulating around the hot internal components.


If these vents become blocked, by pushing a desktop too near a wall or using the laptop on a soft surface, the air supply your internal fans need to cool the system is cut off.


This blockage also traps the heat inside, allowing it to build to dangerous levels.

Keep the air vents on your computer free and clear to allow proper airflow.


Dirty Computer


Airborne particles, such as dust, lint and hair, can gather on the air vents and internal components over the course of time.


This accumulation of dirt not only provides a sort of "insulation" to the electronic components, preventing the heat they generate from dissipating normally, but it also clogs the fan and heat sink to prevent proper function.


Use canned air and damp, soft cloths to thoroughly remove any built-up debris from inside your computer.

Dried Thermal Paste


The heat sink sits atop the CPU chip to help dissipate the heat the component produces. Thermal paste is layered between the CPU and the heat sink to help draw the heat away from the chip for cooling.


Over time, the cooling properties of this paste decreases, and the substance becomes dry and flaky.

You can replace this paste to renew its cooling assistance by removing the old paste remnants with rubbing alcohol and adding a new layer.


Thermal paste is also known as thermal compound or thermal grease, and is available at most electronics stores.
Check you CPU central processing unit make sure its securely seated and has thermal paste it might be getting to hot the thermal paste will help disperse the heat

Thermal compound is a sticky paste that is placed directly onto the CPU.

http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490

Allowing for a more direct heat transfer between the CPU and HEAT SINK and preventing air gaps from forming between the CPU and heat sink.



Hot Environment


When examining overheating causes, don't overlook the environment you use your computer in.

External heat sources, such as fireplaces or even rays of direct sunlight, can cause the internal temperatures of your computer to rise.


This causes your internal fan to run harder in an attempt to dissipate the combined heat before temperatures rise too high.

Move your computer away from external heat sources to encourage more effective cooling.


Hope this helps.

Posted on Nov 28, 2012

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

Noggin
  • 944 Answers

SOURCE: uncontrolled CPU Cooling Fan Speed

Here is the link for all the various support manuals, software and instructions for your PC if you need them; http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=179911&taskId=101&prodTypeId=12454&prodSeriesId=316713 CPU fans should be plugged into the CPU fan power socket on the motherboard, in order to receive variable speed control instructions. If the fan has been incorrectly connected to a different motherboard fan socket, or directly to the power supply then it will run at a constant speed. If it is correctly plugged in to the correct socket, then the hardware management software (there are many possible options here - please post back with which management software you are using and I can give more specific instructions) that comes with the PC should allow you to change the settings - you can change the temperature range at which the cpu fan will go into higher speed mode - it sounds like you may have this set too high You should also be able to control the fans from the BIOS set-up menu - this should be accessible when you boot up. usually it will be by pressing F8, but all systems are set up slightly differently. watch the screen as you boot up and it should give instructions for this. Hope this helps, please give more details of how your machine is set up if you need more specific help :)

Posted on Sep 07, 2007

TeK Micro
  • 62 Answers

SOURCE: Desktop CPU Fan Problem

My first check would be to see if the manufactuer has a BIOS update for the ma inboard that resolves that problem.

If they don't have one available on their website I would contact their technical support because it may be a known issue that they are currently working to correct.

At least knowing you'll know that a fix is only a few months away.

If the manufacturer claims that your problem can't be verified you may have a faulty thermal control unit on the mainboard.


Let me know what you find out.

Posted on Jan 08, 2008

  • 16 Answers

SOURCE: CPU fan races

thanks bigunit12 - as I suspected, no real concern

expect the noise is a pain.

I do think the HS might be marginal and so I shall replace sometime with a higher capacity model, also maybe increase fan flow capacity and add a case hot air extractor fan.

Just to make sure

Posted on Jan 08, 2008

hotratchet
  • 952 Answers

SOURCE: CPU fan runs at high speed and won't boot

Change the setting in the BIOS menu. reboot your computer.. when you see the dell logo.. press F1 (or F2 if F1 doesn't work) button until you see the BIOS screen. Check for fan options and change it

Posted on Jun 20, 2009

pra0099
  • 153 Answers

SOURCE: my sony vgc-rb40 will not boot bios with cpu fan connected

mostly all fans are 12V DC try connecting all the fans directly to SMPS of the system i.e the red and the black wire

Posted on Sep 18, 2009

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Have you tried right clicking on the desktop (opening Display Properties), clicking on Screen Saver tab, Clicking the Power button, and setting the power schemes to Home/Office Desk? If its set on laptop it will reduce the processor speed when running on battery. I have noticed that even with it plugged in that some times it will run at half processor speed. Try that out.

Have a great day,
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turn up the task manager to monitor the cpu load. use ctrl shift esc to bring it up. now open up an application. see as the cpu meter goes from low to full green (high).. then check if the fan also speeds up. i guess you have a cmos setup on the motherboard that monitors cpu load and speeds up the fan.

as for the usb -speaker, please explain further..

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