Noctua Premium Quiet Connection NF-A9 PWM, Fan, 4-Pin (92mm, Brown)

Premium silent fan, size 92x92x25 mm, voltage 12V, connector 4-pin PWM, rotation speed up to 2000 RPM, noise level up to 22.8 dB(A), MTTF＞150,000h Award-winning A-Series design: Noctua's Flow Acceleration Channels and AAO (Advanced Acoustic Optimization) frame deliver superior, quiet cooling performance. Ideal as a replacement fan for 9cm CPU coolers (e.g. Noctua NH-U9(S) or NH-D9L series, etc.), compact PC cases (HTPC/ITX/small cases, etc.), NAS and other devices. PWM version with automatic speed control via 4PIN PWM fan header is available with a wide rotation speed range of 400-2000rpm. (Up to 1550 rpm using the included low noise adapter.) Includes anti-vibration mount, fan screws, low-noise adapter, extension cable, and Y-cable to run two PWM fans on the same header. NF-A9 is a highly optimized premium quality silent 92mm fan. Featuring Noctua's sophisticated aerodynamic design of Flow Acceleration Channels and AAO (Advanced Acoustic Optimization) frame, this product further improves on the award-winning NF-B9, a quiet, high-performance fan. The PWM version uses Noctua's custom-designed speed control chip NE-FD1 IC, which allows PWM control from up to 2000 to 1550rpm using a 4PIN PWM fan connector connected to the motherboard and the included low noise adapter. Superior rolling smoothness, Noctua's standard SSO2 bearings (Self-Stabilizing Pressure Bearings) and Noctua's trusted premium quality make it ideal for those who demand the highest standards.