Buy replacing my top fans of the case, Lian-Li PC-P50 Armorsuit, 2x140cm . On the website Noctua: - The framework of the NF-A15 is provided for attachment dorifices 120mm type (ie a spacing of 105mm) with nevertheless an oversized frame (150mm) offering increased performance for newer CPU coolers. So I ordered two Noctua NF-A14 PWM because of high quality material, etc .. Super fast shipment, thanks Amazon