Moves a lot of air
This fan moves a lot of air through my cuboid case. It is not "silent", but for as much air as it moves, it is pretty quiet. I am using it as an intake fan, so i run it at full speed all the time. I imagine one could get a controller and turn the speed down if noise is an issue. In my application, i have not found the sound to be much of an issue. I have made recordings for broadcast in fairly close proximity to the case and there is no noticeable fan noise on the finished product.I recommend this fan for a larger (or a cube type) case, or where a lot of airflow is needed. Keep in mind that this thing is big. It is nearly 8 inches diameter, so it will not fit comfortably in smaller cases.