Dust filter for PSU

George Lazu · Nov 8, 2014

Hey, i have a problem with dust, it's everywhere behind my desk. Doesn't matter how much i clean. I had to clean my old pc at least once a month because dust got everywhere. When i got a new PC i was happy becacuse it had dust filters on the front, but on the back it didnt. On the back i have a fan that exhaust air, and a PSU [placed at the bottom]. The PSU gets the dust from the back and throws it inside the case [the PSU has the fan inside]. I googled dust filters, but i only found dust filters for fans.

My question is : is there anywhere i can buy a material that is good at filtering dust while allows good airflow which i can buy, cut and place on the back of the PSU?

USAFRet · Nov 8, 2014

The PSU is blowing air out of the back.

Depending on which way you have installed it, it is either sucking air from inside the case, or sucking air from underneath (or from the top for a top mounted PSU).

emdea22 · Nov 8, 2014

use women's socks...

Btw if you smoke in the same room with your PC then thats why you have so much dust. Nicotine accumulates on pc components forming a sticky layer that catches dust like a magnet.

huilun02 · Nov 8, 2014

Get a 120mm magnetic fan filter. Just slap it on the back and should cover the PSU inlet nicely. If its too tall you can cut it and just tape the side that was cut, for rigidity.

If its actually pulling air from the bottom, then yup a 120mm magnetic filter is quick easy fix.

hunter315 · Nov 8, 2014

The PSU fan draws air from the inside of the case and exhausts it out the back, hence why they don't have dust filters, its on the other fans to keep your system dust free.

scout_03 · Nov 8, 2014

the magnetic one with the link http://www.quietpc.com/qpc-filters

George Lazu · Nov 8, 2014

I have a bottom mounted psu and it blows air inside the case, an it doesn't pull it from underneath the case because the circuits inside would stand in the way. It sucks air from outside the case (where you plug in the power cord) and blows it inside.

Edit:

Here is a picture of my system:

The fan blows air inside, and because of that, it pulls it from the back

USAFRet · Nov 8, 2014

George Lazu :

I'll bet it doesn't.
Turn it on. Take a piece of tissue paper, and hold it up to the back where you think it sucks in.
What happens?

hunter315 · Nov 8, 2014

Take a tissue and place it over the fan when its running to see which way it is blowing.

Almost all of them blow down onto the circuits because otherwise you won't move air out of the nooks and crannies, you would only cool the tall components if you had the fan as an exhaust fan.

scout_03 · Nov 8, 2014

if you look carefully at the case specs the psu fan must face down tha case is made for it and why you did not put your gpu in the 1 pci-e x 16 slot below the cpu ?

emdea22 · Nov 9, 2014

George Lazu :

No - it doesn't - i've seen this before on "prebuilt" from certain eastern european shops. They are too cheap to add a fan or 2 for case cooling so they resort to this little trick to force some airflow even tho its doing more harm than good.

Like other said - take a piece of paper and you'll see it actually blows air out (unless its accidentally had its fan put backwards)

George Lazu · Nov 9, 2014

How about that, you guys were right, even though the airflow feels otherwise. Then the question that remains is where does dust come from? There is no intake fan, the only one that might intake air is the CPU fan that sucks air from the side of the case. There i could easily add two magnetic dust filters.

huilun02 · Nov 9, 2014

If more air is being blown out than sucked in by your fans, you are making low pressure within the case, and air will naturally be sucked in through any open holes in the case. Install filters in unused and uncovered fan mounting positions.

Also the general environment and how you maintain your room will also affect how much dust is present in the air, that can end up in your case. Clean and tidy up the room regularly, keep fabric material in the closet, close the windows when you leave your room unattended for a long time.

It also helps to have air conditioning and air purifiers/filters.

In the end you cannot totally prevent dust from settling in your case, but you can do a lot to slow the rate at which dust accumulates.

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Dust filter for PSU

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George Lazu

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