Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctuas AAO frame, the NF-A12x15 is a highly optimised, premium quality quiet fan in size 120x15mm. Its 15mm slim design makes the NF-A12x15 ideal for space-restricted applications such as low-profile CPU coolers or HTPC cases. The FLX version provides 1850/1400/950rpm speed settings via the supplied Low-Noise Adaptors in order to allow full flexibility in fine-tuning the fan for maximum ventilation performance or near-silent operation. Its superb running smoothness, reference-class SSO2 bearing and Noctuas trusted premium quality make it an elite choice for the highest demands.Features15mm slim designHaving a thickness of only 15mm, the NF-A12x15 is much slimmer than standard 120x25mm fans. This makes it ideal for typical slim fan applications such as low-profile CPU coolers as well as for freeing up space by replacing standard 120x25mm fans on tower coolers, radiators or in PC cases.Metal-reinforced motor hubWith many larger-diameter slim fan designs, the shorter axis and bearing lead to a reduced running stability and lifespan. The NF-A12x15 uses a metal-reinforced motor hub, a measure typically found in high-speed industrial fans, in order to guarantee Noctuas signature stability and longevity.Flow Acceleration ChannelsThe NF-A12x15 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.AAO FrameNoctua\'s AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua\'s proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan\'s performance/noise efficiency.Stepped Inlet DesignNoctua\'s Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space-restricted environments.Inner Surface MicrostructuresWith the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency.Integrated Anti-Vibration PadsIntegrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard mounting systems and fan clips used on heatsinks.Smooth Commutation Drive 2The latest version of Noctua\'s advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the fan remarkably quiet even at very close distances.Low-Noise AdaptorThe NF-A12x15 PWM is supplied with a (L.N.A.) that reduces the maximum fan speed from 1850 to 1400rpm. The L.N.A. can be used either to run the fan at a fixed speed of 1400rpm or to cap the maximum speed when using automatic PWM control.3 speed settings for full flexibilityProviding 1850, 1400 and 950 rpm speed settings via the supplied Low-Noise and Ultra-Low-Noise Adapters, the NF-A12x15 FLX (Flexibility) can be fine-tuned for superior airflow or maximum quietness.SSO2 bearingThe NF-A12x15 features the further optimised second generation of Noctua\'s renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.6-year manufacturers warrantyNoctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-A12x15 features an MTTF of more than 150.000 hours rating and comes with a full 6-year manufacturers warranty.Specification:- Size: 120x120x15 mm- Mounting hole spacing: 105x105 mm- Connector: 3 Pin- Bearing: SSO2- Blade Geometry: A-Series with Flow Acceleration Channels- Frame Technology: AAO (Advanced Acoustic Optimisation)- Rotational Speed: (+/- 10%) 1850 RPM- Rotational Speed with L.N.A.: (+/- 10%) 1400 RPM- Min. Rotational Speed: (PWM, +/-20%) 950 RPM- Airflow: 94,2 m/h- Airflow with L.N.A.: 70,8 m/h- Acoustical Noise: 23,9 dB(A)- Acoustical Noise with L.N.A.: 16,8 dB(A)- Static Pres