Loud screeching/squealing/whistling/whining noise coming from my pc

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Funkygraz

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Nov 28, 2013
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Hi,

Recently my computer started making a very loud screeching/squealing/whistling/whining (take your pick) noise. At first it went away but now it seems there to stay. PC seems to run fine but I'm very reluctant to run it because the sound is immensely annoying and I think it might not be the best idea to run it like this. For your convenience I've taped my pc while booting:

http://youtu.be/K496Axp3TWE (sorry for the vertical video)

After googling I have seen various answers ranging from coil whine to faulty pci-e cables. But when seeing the examples on youtube nothing seems to really resemble my sound. Any ideas/thoughts would be greatly appreciated
 
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Z1NONLY

Z1NONLY

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Jan 13, 2012
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"Case open" warning?

Some motherboards have a connection on the MB where you connect one to the cae and one to the door. When the door is removed it breaks the circuit, and sets off an alarm, that in some cases can have the same pitch as your video.
 
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nukemaster

nukemaster

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Nov 23, 2004
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that is a killer sound.

NOT coils for sure.

Sounds more like an alarm of sorts. video card power connections in solid? I know my old AMD cards make something like that if I forgot to plug them in(but you have picture.).

Please check the bios hardware monitoring section to ensure you do not have a slow fan or high/low voltage error.

I have never heard a fan do this, but you can safely with the system at idle stop the fans one at a time to see if the sound changes.
 
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Funkygraz

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Nov 28, 2013
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Any idea what these connectors usually look like? In the video door is closed and I don't remember any grounding or alarm wire from the original system build but can't hurt to double check.

 
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Funkygraz

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Nov 28, 2013
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I've stopped all fans multiple times and it does not affect the sound unfortunately
 
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Funkygraz

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Nov 28, 2013
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I've stopped all fans multiple times and it does not affect the sound unfortunately. I'll check the bios when i get a chance. Its a 5850, I've pressed the 6 pins in pretty firmly and they "clicked" so if it's a power issue then the cable or psu is most likely faulty.
 
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Z1NONLY

Z1NONLY

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Most people never connect them and the BIOS should have it disabled by default, if it even exists on your particular MB.

Go into the BIOS and look for any notification(Usually punctuated with an exclamation point)

Could be open case, CPU fan, CPU temperature, system temp.

Take a peek in the BIOS



 
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nukemaster

nukemaster

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Can you look for your motherboard speaker to see if it makes the noise as well.

It is also interesting to here the sound sort of fade out when you power down. I will run a 5870(I do not have a 5850 to test) without a power connector to see if it makes a noise like that.
 
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Funkygraz

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Nov 28, 2013
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Would be very interesting to see what you find, thanks!

 
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Funkygraz

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Ill get to this tomorrow, people are sleeping here and I think they might bleed from their ears if I boot it right now. That might not be good for my health short term. Will report back after I check for sure though!

I checked and nothing in my bios was enabled regarding errors

 
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nukemaster

nukemaster

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Sorry it took so long, been a bit tied up.

My 5870 made a similar sound with 1 or no power connectors on it, but with the 5870 the fan goes full speed and the system does not post(this may be due to the 5870's higher power consumption.).

I would recommend trying another pci-e cable if you have one or even the molex to pci-e adapters that come with the card.

If this fails, look at the card to see if the power plugs look loose(broken solder, common on laptop power plugs, but not so much on dekstop video cards.)

I will upload a sound file in a sec, but the fan is VERY loud on a 5870 at full speed(maybe I should not have had the recording device so close). The sound like yours also has a strange fade out when the power us shut off.

View My "Video" @ tinypic
 
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Funkygraz

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Nov 28, 2013
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Well I tried several things:

    I tried to boot without my videocard, pc boots fine then. As my MB has no VGA capabilities this is not ideal

    Second i tried to switch pci-e cables for some alternatives from another PSU (mine is semi-modular and has 2 red 8 pin slots wich i plugged them in to test it but my pc wouldnt boot with them.

    Third i switched my videocard with my brothers video card. Now they both seem to work fine.


I can only conclude its a combination of my VGA / MB / PSU not working together. Any ideas on how it could occur / start acting that way.

 
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