I don't know if this is the right category for this...?

[Eat_Yeet]

I have a 8 month gaming computer custom builded by myself and my cousin, and the top fan has recently been making a weird noise/vibrating. I've looked inside the case and see that the top fan has became loose i think. I not sure if it's loose or not cause when I push it up it goes up and let go it goes down just a little inch. It is barely exhausting any air out of it. The case is NZXT S340 default fans.

Please help.

 

[superninja12]

use tape screw it tightly? it isnt anything dangerous no worries

 

[Eat_Yeet]

Where do I screw is the question. I see on the top of the fan (the surface of the top) there are 4 screws. Do I screw them in? and where do I tape?

 

[JackNaylorPE]

You mention several issues ....

1. First you have to isolate the source of the Vibration. Possible cases include:

a) The fan blade assembly moving up and down on the shaft ... very common when horizontal fan used as exhaust.
b) The fan shroud is moving up and down due do not being affixed tightly.
c) Another part vibrating for same reason such as fan grille.

Solution check tightness of all screws; tighten as required.

2. Again there can be multiple causes for the fan not moving air:

a) Low rpm caused by rubbing on something.
b) Low rpm because fan curve is not correctly set up
c) Low rpm because fan is faulty
d) Low air movement due to filters or grilles being clogged with dust
e) Low effective air movement due to air leakage ... air goes out thru gaps (loose shroud) rather than up thru grille.
f) Low exhaust volume because intake flow is restricted

Solution: After resolving Item 1, check fan movement by hand ... check fan rpm and fan curve ... make sure you have more air blowing in that out.... you have two out / zero in at stock.

Suggestion:

Move top fan to front intake and add a 2nd in front ... this will improve air flow and reduce dust into the task.