NH-U9 DX-4189 Noctua’s DX line CPU coolers have become a default choice in premium grade quiet cooling solutions for Intel Xeon processors. The NH-U9 DX-4189 features a larger, custom-designed contact surface for LGA4189 platforms. Based on the proven, 92mm size NH-U9 heatsink and equipped with two of Noctua’s award-winning, PWM controlled NF-A9 92mm fans, it combines strong performance with excellent compatibility for 4U systems and other space-restricted applications. The NH-U9’s direction of airflow is perpendicular to the long axis of the LGA4189 socket, so it is ideal for workstation builds where the top PCIe slot must not be blocked and this orientation is required for having the cooler exhausts towards the I/O panel. Topped off with the professional SecuFirm2™ mounting system and pre-applied NT-H1 thermal compound, the NH-U9 DX-4189 forms a complete premium quality package for quietly cooling LGA4189 based Xeon workstations and servers. Specifications: Cooler Socket compatibility Intel Xeon LGA4189 Height (without fan) 125 mm Width (without fan) 95 mm Depth (without fan) 71 mm Weight (without fan) 660 g Height (with fan) 125 mm Width (with fan) 95 mm Depth (with fan) 120 mm Weight (with fan) 895 g Material Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating NSPR 118 Max. TDP see NSPR Fan compatibility 2x 92x92x25mm Scope of delivery 2x NF-A9 PWM premium fan NT-H1 high-grade thermal compound (pre-applied) SecuFirm2™ mounting kit for LGA4189 CPU carrier frame for LGA4189-4 (P4) NM-SMT5 Torx® T30 mounting tool Noctua Metal Case-Badge Warranty 6 Years FAN 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