I mean normal fan noise, which increases with the rpm
That's rather the airflow
Yes and no. Sure, if you increase the RPM thus increasing the air flow, the noise from the air molecules hitting each other and things in their path will increase. But increasing the RPM also increases actual motor noise too - especially if the bearings are already worn and making noise.
The biggest noise is coming from the intake fans. There are 4 of them and spinning at 1200-1700 rpm.
Why do you have so many intake fans? That alone may be much of your problem. Intake fans tend to be located in front, closer to our ears. Being mounted directly to the case allows any sound and vibrations from the fan to be transferred to the case. Case's are cavernous metal boxes where sounds and vibrations that make sounds can reverberate throughout the case, effectively amplifying those sounds.
Why do you have them spinning so fast? Have you tried a speed controller and setting it to 500 - 600 RPM to see how it affects cooling?
How many exhaust fans do you have? You want a "
slight" over or positive pressure in the case. That means
slightly more coming in than going out. This ensures incoming air only comes in through the [hopefully IMO filtered] intake vents instead of every crack, crevice, and unused port in the computer.
If you have too much positive pressure (not enough exhausting out fast enough) your speeding fans are, in effect, blowing into a solid wall of stagnant air. That can make a LOT of noise.
So what do you have for exhaust? You can count the PSU fan too UNLESS it has its own, dedicated input vent.
Are we talking about the
Velox 100P Airflow noted in your System Specs? If so, according to the specs, it comes with 3 x 120mm intake fans in front and just a single exhaust 120mm fan in back. So how do you have 4 "intakes"? Did you turn the rear fan around or add more?
Another big problem is the fact these are 120mm fans. Smaller fans have to spin faster to move the same amount of air as larger fans. Faster RPM, louder the fan noise.
If the Velox, the PSU is mounted in its own chamber and therefore, is useless when it comes to helping out with case cooling.
I see no mention at all in the specs, product description, or the manual about sound or noise suppression. And sadly, the only fan control appears to be for the ARGB lights, not speed.
Your case (if it is that Velox 100P) supports 3 x 140mm fans in front, and 2 x 140mm fans up top. Sadly
, it only supports the single 120mm fan in back. That is not a good design for cooling, IMO.
If fan noise is a concern for you, you clearly bought the wrong case!
If me, I would start by getting rid of the front 120mm fans and replace them with 2 quality 140mm fans. And I would get a fan speed controller, one that allows you to control each connected fan individually. If the rear 120mm is noisy, replace it with a high quality 120mm. IF you have space for a thicker fan (the standard is 25mm) get one. Wider blades can scoop up and push more air. If your temps are too high with just those fans, or if you have to push the front fans to maximum speed, I would add a 140mm fan up top, in the back position, as an exhaust and, crossing fingers and toes, hope that keeps the innards properly cooled.
If not, shop for a new case. Your priority should be cooling, noise suppression, aesthetics, in that order. I like Fractal Design. Their fans are great too.
I personally don't understand that MSI Velox. It seems they put aesthetics first, then cooling a distant second, and noise suppression no where on the list.
