It's loud. Like aircraft. But you can change native fan to a silent one.
So is it easy to replace it for a quite fan?
Don't change those fans ! They there for a reason. You can change the fan's speed on the miner settings page after you logged in .There is a option called "
Customize the fan speed percentage " you can set the fan speed to lower % there , then your miner going to be more quite bc the lower rpm the fans running, but your boards , asic chips temp will be higher , you facing a reduced lifetime for your miners bc the heat.