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

Noctua NF-A9 PWM, Premium Quiet Fan, 4-Pin (92mm, Brown) Type: Case Fan Bearing Type: SSO2 ( Self-stabilising oil-presure bearing ) RPM: 2000 RPM (standard ), 1550 RPM (w/ L.N.A ), 400 RPM (Mini Rotation Speed) Air Flow: 46.44 CFM (standard), 36.84 CFM (w/L.N.A. ) Noise Level: 22.8 dB(A)/standard, 16.3 dB(A)(w/ L.N.A ) Power Connector: 4 Pin Color: Brown Compatibility: CPU Cooler, Water-Cooling Radiator and Case