The NH-L9a-AM4 is the latest, AM4-specific revision of Noctua’s award-winning NH-L9a low-profile CPU cooler for AMD Ryzen-based HTPCs and Small Form Factor (SFF) systems. At a height of only 37mm, the NH-L9a is ideal for extremely slim cases and, due to its small footprint, it provides 100% RAM and PCIe compatibility as well as easy access to near-socket connectors even on tightly packed mini-ITX motherboards. The custom-designed SecuFirm2™ mounting system for the AM4 socket makes installation child’s play and, thanks to the highly optimised NF-A9x14 92mm fan that supports fully automatic speed control via PWM, the NH-L9a-AM4 runs remarkably quietly. Topped off with Noctua’s renowned NT-H1 thermal compound, the NH-L9a-AM4 combines everything users have come to expect from Noctua’s larger coolers into a super-compact, premium-quality package for ITX and HTPC builds with Ryzen CPUs or APUs. Fan specifications: Model: Noctua NF-A9x14 PWM Bearing: SSO2 Max. Rotational Speed (+/- 10%): 2500 RPM Max. Rotational Speed with L.N.A. (+/- 10%): 1800 RPM Min. Rotational Speed (PWM): 300 RPM Max. Airflow: 57,5 m³/h Max. Airflow with L.N.A.: 40,8 m³/h Max. Acoustical Noise: 23,6 dB(A) Max. Acoustical Noise with L.N.A.: 14,8 dB(A) Input Power: 2,52 W Voltage Range: 12 V MTBF > 150.000 h Scope of Delivery: NF-A9x14 PWM premium fan Low-Noise Adaptor (L.N.A.) NT-H1 high-grade thermal compound SecuFirm2™ Mounting Kit Screws for 92x92x25mm fans Noctua Metal Case-Badge