Having received more than 300 awards and recommendations from international hardware websites and magazines, Noctua’s NH-U9 line has become a benchmark for compact 92mm single tower coolers. The TR4-SP3 version is a tailored custom model for AMD’s TR4/SP3 platform (Ryzen Threadripper / Epyc) and features a larger contact surface as well as the latest SecuFirm2™ mounting system for socket TR4/SP3. Topped off with two of the renowned quiet NF-A9 PWM 92mm fans in a push/pull dual fan configuration, Noctua’s proven NT-H1 thermal compound and a full 6-year manufacturer’s warranty, the NH-U9TR4-SP3 forms a highly compact, premium-quality solution that combines outstanding performance, superbacoustics and excellent compatibility for space-restricted TR4/SP3 systems. FAN Specification: Model: Noctua NF-A9 PWM Bearing: SSO2 Max. Rotational Speed (+/- 10%): 2000 RPM Max. Rotational Speed with L.N.A. (+/- 10%): 1550 RPM Min. Rotational Speed (PWM, +/-20%): 400 RPM Max. Airflow: 78,9 m³/h Max. Airflow with L.N.A.: 62,6 m³/h Max. Acoustical Noise: 22,8 dB(A) Max. Acoustical Noise with L.N.A.: 16,3 dB(A) Input Power: 1,2 W Voltage Range: 12 V MTTF: > 150.000 h