Question about Dell OptiPlex GX270 PC Desktop

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Loud "jet engine taking off" type sound

I have a Dell GX270 desktop that makes a sound like a jet engine ready to take off. I changed the power supply but that didn't help. Has anyone else had this problem?

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  • npuneeth Nov 19, 2008

    I have the same problem... please help. Can't live with this loud Noise

  • zubair_rsd Dec 13, 2008

    i do but problem no solved please give me the solution

  • npuneeth May 11, 2010

    I disconnected the fan plug from motherboard and the noise is gone now. I usually keep my computer turned on all the time. Should I just buy a new fan?



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Mine also rattles like a snake, and it can start right in the middle of the night so that ive 2 stop and just shut it down.(its always on) I just blow the compact fan case using compressed air, lots of fine grainy dust come out then its silent. i believe if capacitors are leaking ( thats less severe than if they totally go off and powerlight is amber) coz my board was replaced by guarrantee several years ago coz of that. but by then i was a kid and didnt know about cooling the computer. i stuffed books beside it and it just got coocked after afew years. ok getting a brand new fan for GX270 might be an issue (tis nolonger being actively producd i guess) so focus more on blowing dust off the machine. i guess it has a resistor same as the CPU fan that increases current on high temperature and yr capacitors get abit less accurate at high temp, leading to the rpm variations.mysteriously mine has become completely silent when i googled 'noisy GX270 optiplex power supply fan' ope it never goes back 2 its rattles again!
A great machine nevertheless! I stick with Dell.

Posted on Mar 28, 2010


Check the capacitors on the motherboard. The GX 270 suffers from bulging/leaking capacitors which can cause all sorts of porblems including the CPU fan racing.

Posted on Nov 10, 2008

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If you changed out the power supply then the only other device that could be making that noise is your CPU cooling fan. To be sure, open the case and disconnect the CPU cooling fan plug from the motherbrd (MAKE SURE POWER IS OFF) and see if the noise stops. Don’t worry about the “Fan Failure Error” when you turn on the computer. Just hit F1 to continue. Don’t leave the computer running without the fan plugged in longer then necessary. After tying this procedure, please contact me for further diagnosis.

Posted on Oct 18, 2008

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