Noctua NF-A12x25 ULN Premium Quality Quiet 120mm Fan\n\nThe NF-A12x25 is a highly optimised next-generation 120mm fan that integrates Noctua's latest innovations in aerodynamic engineering in order to achieve an unprecedented level of quiet cooling performance. It takes state-of-the-art technologies such as the AAO (Advanced Acoustic Optimisation) frame or Flow Acceleration Channels and combines them with a record tight tip clearance of only 0.5mm which is made possible by using the novel Sterrox liquid-crystal polymer (LCP) compound as well as a metal-reinforced motor hub and axis for ultimate precision.\nFollowing the approach of Noctua's A-series; the NF-A12x25 is a true all-rounder that yields superb results in all types of usage; regardless of whether it's in low-impedance; airflow-oriented applications such as case cooling; or high-impedance; pressure-demanding scenarios such as on heatsinks and watercooling radiators.\n\n3-pin ULN version Providing 1200 and 900 rpm speed setti;