*** WARNING *** I am a complete newbie at this!

So I just received a new Nutanix rack mounted server from a friend, two nodes and I don’t intend to run Nutanix on it.

I don’t have a rack or means of mounting it so it is just sitting on a table for now, without any soundproofing. Is it possible to use pwm to control the fans? As far as i can tell, the motherboard can control the fan speeds, like at startup.

Could i replace the fans with a noctua fan?