quieting down rear fan

[giorgione]

I replaced my stock case fan with a very quiet 80mm Panaflo. Now I cannot hear the bearing anymore, but the air coming out still makes nosie. I wouldn't worry too much if the case was under the desk, but it's up high so I can see through the side window.

I'm thinking of removing the case grid (actually concentric aluminium circles) facing the fan. The air coming out hits that surface and makes noise. My estimate is that 1/3 of the exhaust surface is actually the case grid...

What do you think of this? Do you think it would help?

 

[Cerb]

Not much. Undervolting the fan could help, as could adding intake fans.
OR making a muffler.

 

[SuperPickle]

Originally posted by: Cerb
Not much. Undervolting the fan could help, as could adding intake fans.
OR making a muffler.

I desagree. Although undervolting or using a muffler would help as well, cutting out the punched metal fan grill will lessen the "whoosh" noise of the air passing the sharp metal edges.

 

[lenjack]

If it's an exhaust fan on the back, by all means cut out the grill. You'll get more airflow and less noise.

 

[0roo0roo]

no point in undervolting a panaflow. just dremel out that fan grill.
i'm surprised ur psu is quieter then ur case fant hough. esp if ur fan grill sucks like that...would seem to be a lousy case with lousy loud psu.

 

[giorgione]

The case is a Kingwin 424. It comes without a PSU. So I bought a Zalman 400W. The PSU is super quiet.

The 3 fans in the case are not quiet, so I replaced them with Panaflos. I agree, undervolting the panaflo doesn't help, because then it moves almost no air at all.

I will remove the grill... thanks to all who replied

 

[Tiamat]

Originally posted by: giorgione
The case is a Kingwin 424. It comes without a PSU. So I bought a Zalman 400W. The PSU is super quiet.

The 3 fans in the case are not quiet, so I replaced them with Panaflos. I agree, undervolting the panaflo doesn't help, because then it moves almost no air at all.

I will remove the grill... thanks to all who replied

I removed the grille on the back of my Lian Li PC65, and it helped, but i still hear the air hitting the wall behind it. I have a similar fan set up to you as well. I dont think there is really a way to make it fully quiet unless you are not moving a decent amount of air.

 

[Rumpltzer]

Originally posted by: Tiamat

I removed the grille on the back of my Lian Li PC65, and it helped, but i still hear the air hitting the wall behind it.

Next step... take out the wall!!

 

[zShowtimez]

I have to pick my grills for my 120s carefully.. If there is to much material in the way they make an anoyying noise...With no grill or a more "passive" one its quite nice. Also have a fan controller

 

[tallest1]

Originally posted by: Rumpltzer

Originally posted by: Tiamat

I removed the grille on the back of my Lian Li PC65, and it helped, but i still hear the air hitting the wall behind it.

Next step... take out the wall!!

To solve that problem, I made a cube (minus 2 walls)muffler that would fit snuggly over the rear of the computer. I then lined the inside of the muffler with carpet. It worked well but the temps rose quite a bit. Plus it was somewhat a fire hazard :Q

 

[klah]

Originally posted by: tallest1
To solve that problem, I made a cube (minus 2 walls)muffler that would fit snuggly over the rear of the computer. I then lined the inside of the muffler with carpet. It worked well but the temps rose quite a bit. Plus it was somewhat a fire hazard :Q

Replace the carpet with Asbestos! :Q