Noctua NF-A14x25r G2 PWM, Premium-Quality Quiet Round-frame 140mm PC Fan, 4-pin (Brown)

Next-generation round-frame 140x25mm design for unprecedented quiet cooling performance on 14cm CPU coolers such as the NH-D15, NH-D15S or NH-U14S series State-of-the-art engineering (Progressive-Bend impeller with winglets and Centrifugal Turbulator, Flow Acceleration Channels, AAO frame) and construction (Sterrox LCP, ultra-tight tip clearance) 4-pin PWM version for automatic speed control via 4-pin PWM motherboard fan headers, 300-1500rpm speed range (near-silent at idle, powerful under load), fan stops at 0% PWM (semi-passive option) Includes anti-vibration mounts, fan screws, Low-Noise Adaptor (LNA), extension cable and y-cable for running two PWM fans on the same header Trusted Noctua quality with premium-grade SSO2 bearing (MTTF > 150,000 h), safety certifications from UL and TÜV, protected against reverse polarity, over voltage and over current (short-circuits)