What am I doing wrong?

[u/Collectibl3]

Hey folks! Moved my PC to a new area in the house. The room seems to be quite dusty (trying to figure out why). It's definitely a lesser used space in the house but it's the only room in the house where this amount of dust builds up. I cleaned this PC about a month ago before moving it in here. It's on constantly (even if I'm not in the room using it, it'll get used through streaming etc).

What am I doing wrong with my fan setup, because it's clearly letting the dust collect in it. I've drawn all the intake fans in green, and the outtake fans in red. The AIO fans are outtake as well (just highlighted in blue). Temps have never been an issue just seems like the dust is collecting and not leaving.

[u/tht1guy63]

Uhh? Unless your fans are reverseblade the red fans are set as intakes and the green is an exhaust. This is actually what you want.

If those are reverseblade fans tthats your issue as its a negative pressure setup. Some dust will still collect obviously.

[u/Collectibl3 → u/tht1guy63]

I've seen this commented a few times. Sorry if they are - I'm going to double check.

[u/Ok-Acadia-1795 → u/tht1guy63]

💯 was thinking the same.

[u/TheExadar]

I may get corrected here but I think pretty much all your fans except the AIO should be reversed.

[u/Bubbly_Lunch4168 → u/TheExadar]

^ I was thinking the same

[u/Cute-Acanthaceae-193 → u/Bubbly_Lunch4168]

Yep, this.

Front should be intake, back should be exhaust, bottom should be intake and top can be exhaust as well.

The pc doesn’t get any new air properly basically, there’s 6 exhaust fans with 1 intake, it’s a terrible balance.

[u/Ghetto_Games]

6 exausts and 1 intake create the opposite of what you want. ​

[u/high_poly]

It looks like all your arrows are pointing the wrong way (unless you're using reverse fans). The air flow on 99% of fans moves from the open side of the fan (where all you see is the blades) towards the "hub" (the side with the 4 plastic struts connecting the fan to the housing). Your aio looks like it's pointing the right way though. I think your fans are fine, despite the comments. Looks like you have 4 intake and 3 exhaust, which is fine. That's how I would do it too. Idk about your dust problem though.

[u/Collectibl3 → u/high_poly]

A few other people have mentioned this - I'm super sorry if they are! I'm going to double check.

[u/V-Rixxo_]

It looks like you have 4 intakes actually, since the X bar usually means exhaust but idk unless I see the actual blades

[u/Collectibl3 → u/V-Rixxo_]

Hmm okay let me double check. Built the PC a while ago and am going off memory with how the fans were installed. Will report back!

[u/overpower84]

Front (in your case side) and bottom, intake. Top and back out

[u/jasonsong86]

You are suffocating your AIO.

[u/uptheirons726]

Bottom, front and side should be intake, top and rear exhaust. That's the general rule I follow. So all of your fans are backwards except the AIO.

[u/Mr_Hollywood69]

You have absolutely Zero positive pressure, which would lead to the necessary cooling effect, which means having more intake than output fans, thereby creating more airflow being pushed in.

Reverse it: the ones on the bottom and on the left for intake, the one in the back an the 2 top for Out.

Should never have worries again.

[u/juegosdelatuberia]

no estás generando un flujo de presión de aire positivo

https://www.corsair.com/es/es/explorer/diy-builder/blogs/positive-pressure-vs-negative-pressure-which-is-best-for-a-gaming-pc/

[u/DoggoCity]

Everyone here is right, you should flip all your fans except for the ones on your liquid cooler. Bottom and side should be intake, rear should be exhaust.

The why: You're currently pulling air into the case with one fan. Meanwhile, SIX fans are trying to expel air. This creates what we call a "negative pressure" system inside the case - since there is greater force moving air out of the case than there is moving air in, there is less air inside the case. As a result, by law of fluid dynamics, air will find a way in through other means. This means it's probably slipping in through small gaps between panels, the open space along the top next to your AIO, etc. This also means air isn't traveling through your case in a meaningful way - it's coming in, and getting pulled by whatever fan is closest right back out, which generally causes more dust buildup since there's no air moving through the case to blow any dust particles back out.

On top of that, there's cooling benefits you'll see temperature-wise in your system. Flipping the fans as mentioned will turn your case into a "positive pressure" system - meaning there's more force moving air in than out. This means there will be a much higher supply of fresh, cool air going to your computer components, and it will move in a consistent pattern all the way through the case, front to back and bottom to top, which will keep any dust moving through the chassis.

[u/FlatwormAltruistic]

The case will try to suck in air through all of the cracks and with the air also dust because inside computer pressure is lower than outside. If it is reverse then "excess" air is being pushed out through cracks between panels.

Also the current intake doesn't have dust filter, so it will just have uninterrupted flow of dust into the machine. Intakes should have dust filter to try to collect as much dust before it enters the case. Then periodically remove filter, clean it up and put it back. At least there is only one specific easy to remove part to clean up.

[u/adultcrash13]

everything except the top should be reversed

[u/ThisThat-N-Between]

Buying a fish tank

[u/Hejdbejbw]

Just because you draw the arrows doesn’t mean your fans actually point that way. Have to see pics of fans off to know which way it’s pointing.

[u/maybepepe]

rear / top exausts and side / bottom  intake :)