Noctua NF-A14 FLX - 3-Pin Premium Quiet Case Cooling Fan (140mm, Brown) Award-winning 140x25mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance Square frame design is ideal for water cooling radiators (AIO or DIY), PC cases and other chassis (intake & exhaust), cabinet ventilation, etc. 3-pin FLX version provides 1200/1050/900rpm speed settings via Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation Includes anti-vibration mounts, fan screws, Low-Noise & Ultra-Low-Noise Adaptors, extension cable and 3:4-pin adaptor for powering the fan directly from the power supply Trusted Noctua quality with premium-grade SSO2 bearing and more than 150.000 hours MTTF