my cpu fan is running at 3500 rms and gets too hot.

March 28, 2012 at 16:27:04
Specs: Windows 7
my cpu fan is running at 3500 rpms, but my computer only runs for a couple of minutes and shuts down due to over heating.

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#1
March 28, 2012 at 16:36:39
Fan/Heat sink plugged with dust.
Case vents plugged with dust.


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#2
March 28, 2012 at 17:04:01
i took some dust remover (compressed air), and blew out the cpu fan really good and all the other fans as well. it only takes a couple of minutes for the temp, to rise and shut the computer down. i was just wondering if there is anything else that i can do. i can't even run the computer in safe mode to try and figure out what to do. ( i am on my husbands computer that seems so ancient...lol)

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#3
March 28, 2012 at 18:17:38
The only thing it could be is that the heatsink isn't mounted properly on the CPU. Was any work done inside the case just before this problem started? Was the computer tower moved for any reason? You didn't remove the heatsink to clean it, did you?

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#4
March 28, 2012 at 18:57:33
i haven't moved my computer in well over six months, and no i haven't done any work inside the computer as well. all i have done is blown out the dust since this has happened. blowing out the dust hasn't even seemed to help....

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#5
March 28, 2012 at 20:38:07
After cold start, open Task Manager and check your CPU usage on the performance tab. If the usage is 100% then you may have malware running in the background and causing abnormally high heating. There may be another reason it is getting quite so hot, but suddenly very high CPU usage can make it run much warmer than is normal for the system. Normally high CPU usage will only make it run hotter than normal but still within acceptable range, but if there is a lack of proper air flow inside of the case (blocked vents front or back, weak or non working rear exhaust fan, etc.) or other issues, both together could cause your sudden problem.
Some computer cases have a foam filter over the intake front vent but it may be behind the plastic front bezel and may not be visible so you will have to look hard to see if it is blocked and you may need to remove the front to access it to clean it.
You should run Malwarebytes to check for an infection and remove it.
You can run msconfig, go to the Start tab and uncheck all except Microsoft and your antivirus program (come can be added back later if needed), Apply, and restart the machine.

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#6
March 29, 2012 at 00:16:55
3500 RPM is fine for large fan, re-applying thermal paste will fix the problem.

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#7
March 29, 2012 at 10:36:23
well i opened the task manager and my usage was @ 3%.... i took off the front cover and cleaned the front air filter and the fan, took off the cpu fan and cleaned the front of the cpu. i thought this would fix the problem, but it only runs for about a minute and shuts down. i don't know what else to try. just before it shut down, i seen the temperature at about 47 degrees Celcius.....i think i am at my wits end!

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#8
March 29, 2012 at 16:24:46
go into bios and check your power settings. i leave mine on balanced, so after it boots up at full load it will drop to idle. however, in this case, i agree with kuwese, re-apply thermal compound. do you have coretemp installed? it's a free download to monitor temps.

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#9
March 29, 2012 at 16:48:15
i can barely check bios.....it shuts down too fast, but i will try. and i will try and get coretemp installed. i called and talked to someone at best buy and they said it might be my motherboard.....where can i get that thermal compound, and how much will it cost?

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#10
March 29, 2012 at 20:07:35
Anyone who sell computer components will sell thermal compound. You do not need the most expensive one, just a decent one for a few dollars. The proper method is very important and differs by the type of CPU you have, Look up here:
http://www.arcticsilver.com/methods...
And follow the directions.
Make sure to clean off all old compound. Use a quality rubbing alcohol (high %) and an old credit card as a scraper if needed (never metal).

You have to be a little bit crazy to keep you from going insane.


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#11
April 1, 2012 at 09:30:10
If you removed the heatsink, you destroyed the paste. It can NOT be re-used & the system will overheat without it. You can buy "Heat Sink Grease" at Radio Shack for about $3. Apply it according to the Arctic Silver instructions linked to above.

Here's the Radio Shack link: http://www.radioshack.com/product/i...

For what it's worth, my CPU fan runs at about 1800 RPM, my CPU (overclocked Phenom II X3) is currently 29C, board is 26C, room temp is 20C.


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