PSU's fan is pretty much dead (and pretty noisy), any help or replacements?

Rajikaru

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Mar 11, 2015
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THis problem is relating to a SeaSonic Bronze M12, for those that are curious.

So lately my PSU's fan has been making weird noises. Ever since the start of this week it was anything from a small grindy noise to full-on screeching. After a few days of reading up, I was able to determine that something's wrong with it, most likely that it's just dead, though I can't be sure why exactly (It's not like I full-throttle the thing 24/7), but that's beside the point. It's noisy, and while it hasn't broken any components or overheated the PSU, I'm still too scared to actually do anything in case it does do that, so I was curious - are there any ways to replace the fan or have a professional do it? Would it be better just to buy a new PSU (the kicker is I haven't had this PSU for more than 5 or 6 months)?

Here are some pictures of the PSU when I was looking at it to see if anything was blocking it:







 


it looks like he already took it apart :(. well plan B what is the size of the fan

 

USAFRet

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Ah. I just scrolled past those horribly large pics.
 

Rajikaru

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Mar 11, 2015
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I'm not sure how I would determine the fan's size, but would somebody be able to replace it, or would it have a specific brand problem? Like I said I'm the OK it's a seasonic bronze if that helps at all. Also I'm doing all of this from my phone so every thing isn't perfect like image size as you can tell.
 

USAFRet

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Get the ruler, and measure between screw holes.
http://www.tomshardware.com/answers/id-1716550/measure-fan-size.html
 

Rajikaru

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The case is 6 inches, so I'd assume the fan is around 4 inches (also ignore the solution thing my phone didn't load button images and i thought it was the reply butron)
 

USAFRet

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Screw holes, center to center:

Screw hole spacings and fan sizes
32mm between screw holes 40mm fan size
40mm between screw holes 50mm fan size
50mm between screw holes 60mm fan size
60mm between screw holes 70mm fan size
72mm between screw holes 80mm fan size
83mm between screw holes 92mm fan size
105mm between screw holes 120mm fan size
 
When I had to do this fix, the fan in my PSU was simply a common computer case ventilation fan. In my case it was the 80mm size. I just bought an 80mm 3-pin fan (NOT 4-pin or PWM) and spliced the appropriate wires inside the PSU, then used the screws to fasten it. As you can see on your old fan's label, it is for use with a power supply of 12 VDC, same as any case fan.

You will note that your old fan has 2 wires, Red and Black. It is VERY likely that they used the same color coding that a new fan has. So you just connect fan Red to old fan's Red, Black to Black. For the Yellow wire on the new fan, just snip it short, tape its end and wrap it out of the way. It does NOT connect to anything.

Just to be sure about directions, observe the old fan's turning direction, and the direction it is mounted in the PSU. Make sure the new fan does the same, and turns that way when wired and powered on. To help, examine the fan case. It should have two arrows on it. One shows the direction of fan rotation when it is wired correctly. The other shows the direction of air flow when the fan runs. Your old fan may also have such arrows.
 

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