Question about Dell Dimension E521 PC Desktop

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Main fan on dell dimension e521 on full blast when comp on


please help me out. my dell e521 desktop main fan is always on full speed when the computer is on. i dont have a clue how to fix it.. the cool and quiet is enabled in bios.

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  • Tedmouse May 09, 2009

    Help 1.1.11 bios did not help
    e521 has never been touched nor any add ons applyed
    fan went off at full speed when the new bios came in bios 1.1.11!!!!!!!!!!!!!!!!!!!!!!!!!!

  • Abhinandan  Patil
    Abhinandan Patil May 11, 2010

    so what is the problem



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Upgrade to bios 1.1.11 and you will be all set.  - worked for me!

Posted on Mar 09, 2009

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Do you have your PC in some sort of enclosed space with little ventilation? If so, the constant fan activity is your PC trying to keep things cool inside. With little ventilation comes great heat, and PCs like it cool.

Posted on Dec 28, 2008


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Fan runs to fast

usually caused by a dust build up, meaning the pc is getting too hot, blow out the machine with compressed air.

Feb 20, 2012 | Dell Dimension E521 PC Desktop

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How can I replace the fan on my Dell Dimension E521 desktop? A few days ago, it started making rattling noises. Yesterday it stopped entirely. I shut down, then turned back on and there was a black...
Once the cooler is out unscrew the fan and go with it to a pc shop and get an similar one - make sure it has the same number of wires.

Aug 19, 2011 | Dell Dimension E521 PC Desktop

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Dell dimension e521 won't turn on

hi !
If your have already changed the power supply, there is still a lot of main points of failure in the no power situation. If the motherboard has a flea light, then it could be one of the components. It can be the memory(if no beeps are heard, then memory is not the cause), it can be the processor, or it can be the control panel, in which the power button is attached. Try to check the cables as well.
Cheers !

Dec 25, 2009 | Dell Dimension E521 PC Desktop

1 Answer

Noisy system fan

Here are a couple things to check.

  1. Are there other fans (other than the one you replaced) in the system? Many times, even with systems that use one main fan to cool the CPU and case, there can still be a fan within the power supply. There's a good chance that the power supply fan is the noisemaker. Also check for a fan on the video card.
  2. Check to make sure there are no wires or debris that could be lying against the fan blades.
My guess is #1 is the culprit.

Mar 16, 2009 | Dell Dimension E521 PC Desktop

1 Answer

My processor is always at hi speed,whats the coarse

Try ctrl, alt, down arrow all at the same time. If this doesn't slow it down, this is the only speed your system is designed to run at. Some systems allow changes, some don't.

Jan 30, 2009 | Dell Dimension E521 PC Desktop

2 Answers

DELL PART # DN804 For E521 computer


Dell Part # DN804 is PCI-e ATI Theater 650 Pro Combo Analog/Digital TV Tuner and it is compatible with Dell Dimension E521.

The ATI Theater 650 Pro PCI-e card is available in two form factors - Low Profile or Full Height. Dimension E521 is compatible with Full Height cards only. It is important that you ensure the you receive a full height card.

Check Installing a PCI Express Card for help installing the hardware. Next install required software/drivers.


May 03, 2008 | Dell PART NUMBER CARD NTWK PCI TR IBM 16/4...

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