Perfectly suited for 9cm CPU coolers like theNH-U9(S) & -D9L series, as well as compact PC cases including HTPC, ITX, and Small Form Factor builds. It's also an excellent replacement fan for NAS systems and other devices requiring efficient, quiet cooling. Experience superior cooling with -A9 PWM .Black.swap, 92x92x25mm quiet fan. Operating at 12V with a 4-pin PWM, it achieves a maximum speed of 2000 rpm and a noise level of just 22.8 dB(A), ensuring over 150,000 hours of mean time to failure. Designed for excellence, this award-winning 92x25mm A-series fan features Acceleration Channels and an Advanced Acoustic Optimisation frame, enhancing airflow and reducing noise for unmatched cooling performance in your computing environment. The 4-pin PWM version of this fan supports automatic speed control via PWM fan headers, offering a broad 400-2000rpm speed range. It can stop completely at 0% PWM, making it ideal for semi-passive systems that require silent operation during low-load periods. Enhance your system's aesthetics with the .black.swap edition's all-black design and interchangeable anti-vibration pads in red, black, white, blue, yellow, and green. Customize the look to match your style with four pads of each color included.