Have built in a Fractal Design Define Mini fan. It is expensive but really great. One notices already unpacked when that this plays in a different price range. He's a little heavier than cheaper fan, no cheap plastic but high to handle, to decouple a lot of accessories. No storage loops, no clacking. Chokes I do it at 500 rpm. He is silent and even under full load it is not noisy. Expensive but high quality and worth the price.