NEVER USED! Noctua NF-A15 HS-PWM 140mm Case Fan

This is a Noctua NF-A15 HS-PWM 140mm computer case fan. The Noctua NF-A15 HS-PWM No Box, as is. NEVER USED (High-Speed Pulse Width Modulation) is a premium-grade, 140mm fan designed specifically for high-performance CPU coolers and as an upgrade for 120mm fan mounts. It is characterized by its 150mm wide round frame, 1500 RPM maximum speed, and SSO2 bearing system for quiet, durable operation. Key Features & Performance 1500 RPM Speed: The HS-PWM model features a maximum rotational speed of 1500 RPM, providing higher airflow and static pressure than the standard 1200 RPM PWM version. Aerodynamic Engineering: Features Flow Acceleration Channels (on the suction side) and an Advanced Acoustic Optimisation (AAO) frame to reduce noise and improve efficiency. SSO2 Bearing: Noctua's second-generation self-stabilizing oil-pressure bearing, which ensures superior stability and long-term durability. Dimensions & Compatibility: The fan has a 140mm height, but a 150mm width, and utilizes standard 120mm mounting holes (105mm spacing). 4-Pin PWM Support: Allows for automatic, motherboard-based speed control. Performance Metrics: Max airflow is approximately 140.2 m³/h (82.52 CFM), with a maximum noise level of 24.6 dB(A).