Choose a box to ventilate these HTPC 2 8 cm silent fans do their job. Connected to a programmable dynamic Rhéobus is really top! In addition, to limit the low noise and vibration, I took care to mount with silicone fixation like the other 2 12 centimeters of my boitier.Merci PCLOOK for your fast shipment bubble envelope as mail , thank you to find on Amazon.