How to fix eerie wind noise from case fan

element059 · 10 Jan 2021 at 15:00

Hi guys,

Weird question but this is bugging me. I've got two Corsair static pressure fans mounted at the bottom of my case and they are producing a really eerie wind noise. From what I've found it's caused by the width of the grills in the case. From experimenting placing the fans under a push configuration or moving the fans 2cm away from the grill fixes the problem. However, none of these are real solutions as they can't be mounted in this way.

Would a different fan type such as a airflow fan or maglev fan solve this issue?

I also have one of these fans vertically mounted at the rear of the case in a push configuration and it doesn't have the same issue, so seems to be the placement and grill type that's doing it.

Thanks

Hotwired · 10 Jan 2021 at 15:05

The noise is not from the fan but the airflow through the grilles.

You could turn the fans down until the airflow stops making creepy noises or cut out the offending grille so there's nothing to make funny noises through.

Mr Evil · 10 Jan 2021 at 15:20

element059 said:
...moving the fans 2cm away from the grill fixes the problem. However, none of these are real solutions as they can't be mounted in this way...

If there's space for the fans 2cm away then they can be mounted like that. I've done it before by taking another fan of the same size and cutting out the actual fan, leaving only the frame. The empty frame can then be used as a spacer for mounting the other fan.

element059 · 10 Jan 2021 at 17:55

Mr Evil said:
If there's space for the fans 2cm away then they can be mounted like that. I've done it before by taking another fan of the same size and cutting out the actual fan, leaving only the frame. The empty frame can then be used as a spacer for mounting the other fan.

That's a good idea thanks ill try that

Hakanese · 10 Jan 2021 at 17:57

You can get Fan shrouds that lift the fans away from the grill too, used to be used in watercooling for when you want to get rid of dead space in airflow on the radiators

pp111 · 11 Jan 2021 at 17:11

element059 said:
Hi guys,

Weird question but this is bugging me. I've got two Corsair static pressure fans mounted at the bottom of my case and they are producing a really eerie wind noise. From what I've found it's caused by the width of the grills in the case. From experimenting placing the fans under a push configuration or moving the fans 2cm away from the grill fixes the problem. However, none of these are real solutions as they can't be mounted in this way.

Would a different fan type such as a airflow fan or maglev fan solve this issue?

I also have one of these fans vertically mounted at the rear of the case in a push configuration and it doesn't have the same issue, so seems to be the placement and grill type that's doing it.

Thanks

Fans are designed to work better in push mode than pull mode. They always make more noise in pull mode. It's down to the closeness of the grill. Many moons ago I would cure it by taking apart old fans and just using the fan body as a 25mm spacer! You can buy something now, just search for fan shroud. The thicker the better.

ttaskmaster · 11 Jan 2021 at 18:19

pp111 said:
Fans are designed to work better in push mode than pull mode.

Then why don't they?
Seems there's a fair few tester/reviewer types whose results suggest there's generally no difference in performance between Push and Pull alone. Pull just traps less dust between fan and rad.

varkanoid · 13 Jan 2021 at 14:12

Rubber grommets for the fan screws.

varkanoid · 13 Jan 2021 at 14:13

Mr Evil said:
If there's space for the fans 2cm away then they can be mounted like that. I've done it before by taking another fan of the same size and cutting out the actual fan, leaving only the frame. The empty frame can then be used as a spacer for mounting the other fan.

I did that too for a custom AIO sadly the pictures have long gone from the forum double fans with no inners