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Quiet a noisy PSU

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July 26, 2013 5:55:24 AM

I tried asking this question on another thread, but all I got for a response was, "Your PSU is terrible! Replace it! Replace it!". I'm not replacing it now. SORRY! If I get enough change, I will. Anyways...

My PSU is a bit noisier than what I would like it, anyone have suggestions to quiet it down?

Thanks!:) 

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July 26, 2013 6:03:59 AM

Take it apart and clean out all the dust with compressed air or Q-tips. If it is new and doesn't have much dust in it, it's either defective or it is just made to be noisy.
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July 26, 2013 6:11:56 AM

OK...It's not exactly....a good one... ^_^

Any case mod tips? Foam in the case? Could that help with noise dampening? Or will it just create a massive fire risk?
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July 26, 2013 6:21:55 AM

If it's a cheap one I would not put more flammable stuff by it lol, it's probably already a tinderbox itself. It's probably just a cheap fan on it, probably going to be noisy.
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July 26, 2013 6:25:14 AM

antiglobal said:
Buy a quiet fan and replace the stock one with it. Make sure that the new fan is the same dimensions, same voltage (12V), same number of pins (2, or 3, or 4 even), and that has the low dB level. Ofcourse, it has to have same (or better) air flow, but good luck finding a specs for that stock fan...


People have told me to replace the fan inside the PSU, but no way in HELL am I opening that thing up and risking getting shocked by 110v of electricity! (In fact, just 6 months ago somebody in my town died from doing that exact same thing).

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July 26, 2013 6:31:12 AM

Yeah, I wouldn't open my $100 dollar PSU just for that reason, I took electronics in high school, capacitors can be not friendly to disturbance, Voltron anyone??? (I would love if someone got that 1980's crappy electronics school vid reference)
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July 26, 2013 6:41:17 AM

This is a made up story about a psu: faux .......definition below

artificial, bogus, dummy, ersatz, factitious, fake, false, imitation, imitative, man-made, mimic, mock, pretend, sham, simulated, substitute, synthetic
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a c 84 ) Power supply
July 26, 2013 6:45:32 AM

Why are you willing to buy sound damping material or even a new fan for a junk PSU? If you lack the change (or did you call it coin?) to buy a new one why spend anything to make the NOISE better? You'll still be left with a tinderbox powering your computer.

If you are unwilling/able to change the PSU I suggest you take it out and get it as dust free as you can. Make the power load as low as you can. Do this by underclocking/volting your CPU and GPU. Remove all USB and extra devices as you can including drives and cards. Run it this way until you get the change to buy a better quality PSU.
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July 26, 2013 6:55:21 AM

antiglobal said:
FauxFox said:
antiglobal said:
Buy a quiet fan and replace the stock one with it. Make sure that the new fan is the same dimensions, same voltage (12V), same number of pins (2, or 3, or 4 even), and that has the low dB level. Ofcourse, it has to have same (or better) air flow, but good luck finding a specs for that stock fan...


People have told me to replace the fan inside the PSU, but no way in HELL am I opening that thing up and risking getting shocked by 110v of electricity! (In fact, just 6 months ago somebody in my town died from doing that exact same thing).

Interesting...but I thought that the fan was soldered in there?




You can get killed by the power supply, yes. But I can tell you how to do it safely, it is trivial. Unplug the power supply cord, wait for a while (10-15 minutes, but you don't really need to wait since you won't be taking the PCB out) for capacitors to discharge (there should be a "bleeder" resistors for that purpose), open the case, unplug the fan connector, unscrew the 4 screws holding the fan, put in a new one, screw it in, plug in the connector, and close up the case.
The only thing that can kill you (if the power supply is turned of / unplugged, ofcourse) are the big (probably 2) 250V/400V electrolytic capacitors. They can kill you only if you unscrew the screws holding the circuit board and touch the capacitor pins (or traces and other components pins connected to them, of course) on the other side of the board.
Also, you can always wear the rubber gloves if you are scared.

P.S. I am an electronics engineer.



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a c 84 ) Power supply
July 26, 2013 8:38:36 AM

As I understand things if you unplug the cord from the back of the PSU and then hit the button in front the caps should discharge as they try to answer the turn on request. As mentioned above you aren't removing the PCB from the casing so there shouldn't be anything to fry you. The fan will be on the top of the case when you take that off so as long as you aren't sticking your head in the bottom of the case there won't be any chance of danger.

Of course I would never suggest someone do something they aren't comfortable with. "Your focus determines your reality", so if you think its bad you'll find a way to make it happen.
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