Weird and a bit loud noise coming from my desktop PC.

As it was stated above, my pc makes a weird and a bit loud noise. It started doing it around the 10th of January, but it lasted only 3 hours. That noise was never heard again, until today (26th of January). I personally think it was the PSU (power supply) and to be a little bit more sure, i opened the PC case and turned on the computer and started listening where exactly was the noise coming from and i still believe that it was coming from the power supply.

I know for a fact that you are going to say that there are many other people who posted the same thing as me (their power supply was making weird noises etc.), but i looked up the forum and searched threads which had the same problem as me and every single thing people answered to them was to make sure the fan wasn't hitting anything (cables, case..), the power supply wasn't dusty or had any bugs in it and such things. I can say that their answers could be helpful but on my case they weren't.

I cleaned my pc as good as i can, made sure nothing was hitting anything and still my power supply kept making that noise. Of course, the problem could be the fan of the power supply, because my pc build is a little bit old.

My PC parts are:

CPU: Intel Core 2 Quad Q8300 2.50GHz

RAM: 4,00GB Single-Channel DDR2 399MHz


STORAGE: 931GB Western Digital WDC WD10EACS-07D6B1 ATA Device (SATA)

GPU: LL 3220T (1920x1080@60Hz)
1024MB NVIDIA GeForce GT 120 (Sapphire/PCPartner)

I don't actually remember the PSU (a little bit ironic don't you think? :P) brand and i am not going to open the PC case once more because i am not willing to spend 30 minutes trying to remove all the cables and the screws just to see what brand is my PSU.. i just know that it is a 450W one.

Just to sum all this up, my power supply makes a weird noise that it shouldn't be doing and it started suddenly doing it. My pc is clean and everything is connected to each other successfuly. Also, my PC is about 7 years old!
5 answers Last reply Best Answer
More about weird bit loud noise coming desktop
  1. Well if you've checked everything, and are confident enough its coming from the power supply, then I would replace the power supply. If its a high pitch squeal, then definitely.
  2. The noise that it makes is more like when the fan hits metal or something like that, but i think the fan doesn't hit anything. The thing is, will anything harmful happen to my computer if i keep using this power supply? And if it is going to be "broken", will it have any consequences on the other pc parts?
  3. A psu will not last forever, particularly a cheap unit that is typically included in pre-built pc's.

    Your pc is old, and obsolete.
    I would not put any more money into it.
    So long as it still works for you, keep on using it.
    Keep your backups up to date so if it fails, you can rebuild easily.
  4. cpatel1987 and geofelt
    You are telling me that if i want to change it then i should, since it's not going to harm my other components. So, i could use it till it "breaks" and then buy a new one, right? If so, thank you for your answers and since there's nothing i could do to stop that noise, i should buy a new one.
  5. Best answer
    First, really verify that the sound is coming from the psu.
    The cpu cooler fan or a case may be the problem
    Use a rolled up paper tube put to your ear to act as a stethoscope and pinpoint the source.
    If you think it is a fan, carefully stop the fan with your finger and see if the noise stops.

    If you want to replace the psu, A Corsair CX430 is often on sale for $30 or so, after rebate.

    If your psu is a cheap unit, and if it fails, it really can damage anything it is connected to.
    If you keep using it, protect yourself from that possibility with external backups of whatever you value.
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