How do I make my case fans more silent?

[Detevtive Marvel]

I just built my first gaming pc and the fans are connected to a nzxt sentry 3 fan controller, when the computer starts they are loud for a few seconds then go quiet but they are still pretty noticeable.
Any methods to reduce noise?
These are the fans I have
I have the fan controller but the fans at 40% the lowest setting I think
https://uk.pcpartpicker.com/product/sdZQzy/cooler-master-case-fan-r4l2r20acgp

 

[timeconsumer]

Are you certain it is your case fans that are loud initially? Often times that is the GPU spinning up initially, which can be much louder.

 

[Detevtive Marvel]

Are you certain it is your case fans that are loud initially? Often times that is the GPU spinning up initially, which can be much louder.

Yes I'm sure its the fans because when I use the controller to turn them off its completely silent

 

[timeconsumer]

Well it sounds like your fan controller at startup is sending a signal to power the case fans at 100% speed for a few seconds. Considering these are 2000 RPM max sleeve bearing fans, that's going to be a little noisy. Most 120mm fans have a max speed of 1200-1500 RPMs.

I can't find any information on this happening for someone else with this controller. I assume you have the temperature probe installed correctly? You may want to contact NZXT support about it and see if it is normal.

 

[Detevtive Marvel]

Well it sounds like your fan controller at startup is sending a signal to power the case fans at 100% speed for a few seconds. Considering these are 2000 RPM max sleeve bearing fans, that's going to be a little noisy. Most 120mm fans have a max speed of 1200-1500 RPMs.

I can't find any information on this happening for someone else with this controller. I assume you have the temperature probe installed correctly? You may want to contact NZXT support about it and see if it is normal.

Where do I put the probe?

 

[timeconsumer]

According to the manual the probe should be installed as close to the CPU as possible or on the heatpipes of the CPU cooler.

 

[Detevtive Marvel]

According to the manual the probe should be installed as close to the CPU as possible or on the heatpipes of the CPU cooler.

Not too much of a difference but I have found what the main problem is, the side panel fan is making a droning sound but if held still is more quiet any suggestions? I was thinking foam pads

 

[timeconsumer]

Sounds like it is causing the panel to vibrate and resonate. Honestly I would remove the fan entirely. I have found that side panel fans have little to no effect on temperatures. Otherwise you can try something like an adhesive foam strip from a craft store and see if you can get the panel to fit a little tighter.

 

[Detevtive Marvel]

Sounds like it is causing the panel to vibrate and resonate. Honestly I would remove the fan entirely. I have found that side panel fans have little to no effect on temperatures. Otherwise you can try something like an adhesive foam strip from a craft store and see if you can get the panel to fit a little tighter.

The fan seems to work well though do you think rubber screws would make a difference?

 

[timeconsumer]

They are worth a shot. But I would honestly try disconnecting the fan and see what happens to the temperatures of your CPU and GPU.

 

[Detevtive Marvel]

They are worth a shot. But I would honestly try disconnecting the fan and see what happens to the temperatures of your CPU and GPU.

Ok thanks for your help I'm gonna try rubber screws if they don't work I may try foam padding