Built on the basis of the legendary NH-D14 and carrying on its quest for ultimate quiet cooling performance, Noctua’s flagship model NH-D15 is an elite-class dual tower cooler for the highest demands. Its expanded heatpipe layout and two premium grade NF-A15 140mm fans with PWM support for automatic speed control allow it to further improve the NH-D14’s award-winning efficiency. Topped off with the trusted, pro-grade SecuFirm2™ multi-socket mounting system, Noctua’s proven NT-H1 thermal compound and full 6 years manufacturer’s warranty, the NH-D15 forms a complete premium quality solution that represents a deluxe choice for overclockers and silent-enthusiasts alike. Fan specifications Model: 2x Noctua NF-A15 PWM Bearing: SSO2 Max. Rotational Speed (+/- 10%): 1500 RPM Max. Rotational Speed with L.N.A. (+/- 10%): 1200 RPM Min. Rotational Speed (PWM, +/-20%): 300 RPM Max. Airflow: 140,2 m³/h Max. Airflow with L.N.A.: 115,5 m³/h Max. Acoustical Noise: 24,6 dB(A) Max. Acoustical Noise with L.N.A.: 19,2 dB(A) Input Power: 1,56 W Voltage Range: 12 V MTBF > 150.000 h