Power supply fan is buzzing

So, my power supply fan has started making this buzzing noise. It only happens for the first three or four minutes after I boot up the PC, and then it settles down and runs normally again. Even so, it’s incredibly irritating and definitely not something I want to deal with. I saw a video on YouTube where someone replaced their own fan, so I was wondering if anyone here has actually tackled a project like that? I'm honestly not even sure where I would go to find a replacement part that fits. Thanks

So, what kind of power supply are we talking about? I guess you'll need to check which fan is inside to find something with similar specs, and you'll probably need a soldering iron too.

fadedsailor17 said:So, my power supply fan has started making this buzzing noise. It only happens during the first three or four minutes after I boot up the PC, and then it settles down and runs normally without any noise. Naturally, this is incredibly irritating and I'm not a fan of it. I watched some guy on YouTube replacing a similar fan, so I wanted to see if anyone here has actually done this. I have no idea where I would even go to find a replacement fan that matches this specific model. Thanks.

My advice? Just buy a high-quality power supply unit. A better unit will run cooler, be more efficient, and ultimately last much longer than your current one once you've swapped out the fan. Most fans are standard 12V, though some use a connector while others require soldering... just be extremely careful not to swap the wires (the thin black and red ones, positive and negative) because the fan will spin backward. Keep in mind that a larger fan can move the same amount of air at a lower RPM, which is an important factor. Replacing it is straightforward: unscrew the four screws on the PSU casing, remove the old fan, and secure the new one with four screws—unless you have to solder the connector. Personally, I find it easier to just snip the old wires and splice them into the new fan so you don't have to lift the entire PCB off the components just to reach a solder point.
The bearings are likely worn down, causing that initial vibration until the blades find their proper path. And for heaven's sake, don't forget you absolutely must unplug it from the 120V outlet 😁 ... unless you're looking for an unexpected light show.

fadedorca66 said:What kind of power supply are we talking about here? You'll need to check which fan is inside to find one with similar specs, and you'll probably need a soldering iron too.

Honestly, I have no clue. I won't be able to tear the case open today or tomorrow since I first need to figure out if it's still under warranty—that seems like the easier route. Once I get some free time this week, I'll crack it open, see what's in there, and let you know.

Jerry Robinson56 said:I’d recommend just buying a higher-quality power supply; it’ll run cooler, draw less power, and likely last longer than the old one once you swap the fan. Most fans are standard 12V, though some have connectors while others require soldering... just be careful not to swap the wires (thin black and red, minus and plus) or it'll spin the wrong way. A larger fan can move the same amount of air at lower RPMs, which is an important factor. Replacing it is pretty straightforward: unscrew four screws on the power supply housing, then four more for the fan itself, then either plug it in or solder it. It might actually be easier to just snip the wires and splice them so you don't have to lift the entire circuit board out of the unit just to reach the solder points.
The blades are worn down, so it vibrates at first until it finds its rhythm. I suppose you shouldn't insist on unplugging it from the 230 V 😁 ... otherwise, it might cause a short.

Well, I'm not looking to buy a whole new power supply right now. The fan blades are just worn out, and from what I've seen on YouTube, replacing the fan itself isn't that difficult. I was mostly wondering if anyone here has done this before and could offer some advice. More importantly, how am I supposed to find the right part? I saw some options on Amazon that look identical, but they're listed as chassis fans. I guess I'm not sure if it's a good idea to take the old one to a local Best Buy and try to match it visually—if that's even how it works.
Anyway, thanks for the help, guys.👍
And have a happy and blessed Christmas.😉

Some power supplies have an 80mm fan sticking out the back, while others run a 120mm fan on the bottom. It’s pretty easy to check if you just peek through the grill on the rear—you'll see which one it is. Honestly, if you still have the receipt from when you bought the rig, the model number should be right there. Just look up the specs online to see how they built it. Why make it complicated?
Honestly, swapping out a fan in a power supply is strictly hobbyist territory. If I’m being real, once I get bored enough, I just ditch the whole PSU and grab a new one. You know the drill—after a little while, those fans start seizing up in the bearings. It makes that annoying buzzing sound, which is basically the unit's way of telling you it's still spinning, but barely. Why bother fixing it? Just swap the whole thing.

Some power supplies come with a plug already on the connector, so there’s zero soldering required.

But you definitely need to figure out the exact model first.

If you're dealing with a high-end unit, maybe it's worth messing around with, but if it's just some cheap $33 that's a few years old and you're looking at dropping $13 on a new fan plus wasting half an hour swapping it out—I guess you're better off just buying a new one.

fadedsailor17 said:Honestly, I haven't a clue, and since I won't have the chance to tear apart my PC case today or tomorrow, I was thinking maybe I could check if it's still under warranty just to make things a bit easier. Once I actually find some free time this week, I'll dig through everything, figure out which model I have, and then get back to you.

And well, I really don't want to go out and buy a whole new power supply right now, because it seems like the fan blades are just worn down; I saw a video on YouTube suggesting it isn't actually that difficult to swap them out, so I was wondering if anyone here has ever tried it? If so, I'd love any advice you might have, and most importantly, could someone tell me how and where I can track down the right fan? I spotted some on Amazon that look pretty much identical, but the description says they are specifically for fan housings. You know, I'm just a little unsure if it's a good idea to take the old one with me to a local shop like Best Buy to find an exact match—like, is that actually how it works?
Anyway, thanks so much for all the help, guys! 👍
And have a very happy and blessed Christmas! 😉

I've actually replaced the fan in my power supply a couple of times myself. You basically just unscrew it, open the unit up, pop the old fan out, head down to the hardware store, show them what you need, grab the new one, put it all back together, screw everything tight, and reinstall it. It really shouldn't take more than about ten minutes in total.

Just one thing to watch out for: when you're installing that new fan, make sure it's oriented exactly the same way the old one was, so it's actually pulling air out instead of blowing it in. Usually, there's a little arrow on the fan hub that shows you which direction the airflow is supposed to go.

Also, please be careful not to cut yourself while you're tinkering with it; for some reason, the metal finish on power supply casings is always absolutely terrible, regardless of how expensive or high-quality the unit is, so it's surprisingly easy to get a nasty scratch if you aren't being super careful.

fadedsailor17 said:Look, I have no intention of dropping cash on a brand-new power supply right now just because the fan bearing has finally given up the ghost. I watched a few videos on YouTube suggesting the replacement isn't an impossible feat, so I figured I'd ask if anyone here has actually tackled this. Specifically, I need some guidance on how to track down the exact part. I was browsing Amazon and saw something that looks identical, but the description labels them as fan housings rather than the fans themselves. It’s a bit of a dilemma—is it wise to just pull the old one out, walk into a local Best Buy, and hope for the best by matching the visual?
Anyway, thanks for the input, everyone. 👍
And a Merry Christmas to you all. 😉

Right back at you. May your setup run quieter than ever. 🙂

Nothing about the task itself is particularly difficult, though one must question the underlying logic. I have personally gone as far as bending pins on processors in my time. There is an old adage worth remembering: I am simply not wealthy enough to afford cheap things. This is especially true when you are working for your own benefit; it is more prudent to do a job once and do it right so it lasts. If you settle for a quick fix now, you will likely be staring at the same problem again next year. A replacement fan isn't necessarily going to outperform the "original" when it was first installed.
The critical factor with these components is ensuring the dimensions match perfectly. Since most of these are standardized, finding a fit shouldn't be an issue.
As someone else pointed out, you also need to pay attention to the rotation direction. There should be an arrow printed directly on the fan housing indicating both the direction of rotation and the airflow direction.

Kenneth Cruz67 said:I’ve swapped out the power supply valve a handful of times myself. You unscrew it, strip the unit down, pull the valve, head over to the local hardware store, grab an identical replacement, thread the new one in, put everything back together, and bolt it all down. The whole ordeal takes maybe ten minutes tops.

The only thing you really need to watch for when installing the new valve is ensuring the orientation matches the old one—specifically, that it exhausts air rather than pumping it in. Usually, there is an arrow on the valve stem indicating the direction of airflow.

And do try to avoid slicing your hands open during the assembly or disassembly process. For some inexplicable reason, the finishing on power supply housings is consistently abysmal, regardless of how much you paid for the unit or its supposed quality. It is far too easy to get cut if you aren't being meticulous.

A solid ten minutes, several times over. 🙂 Furthermore, I would suggest using compressed air to clear out any debris rather than a vacuum cleaner. Once it's clean, sliding a new component in takes mere seconds...