Noctua NH-D9L - Processor cooler - (for: LGA1156, AM2, AM2+, AM3, LGA1155, AM3+, LGA2011, FM1, FM2, LGA1150, FM2+, LGA2011-3, AM4, LGA1200) - aluminum with nickel plated copper base - 92 mm

PWM support and low-noise adaptor. The NF-A9 92 mm fan supplied with the NH-D9L supports PWM for convenient automatic speed control through the mainboard. In addition, the maximum fan speed can be reduced from 2000 to 1550 rpm using the supplied low-noise adaptor for even quieter operation. Low-profile tower design for better airflow efficiency. While most low-profile coolers blow air towards the motherboard, the NH-D9L is a tower style cooler that bows parallel to the mainboard, which allows for superior airflow efficiency in cases with front intake and rear exhaust fans that create an airflow path parallel to the mainboard. NF-A9 premium fan. The highly optimized NF-A9 premium fan features Noctuas proprietary AAO frame as well as sophisticated aerodynamic design measures such as Flow Acceleration Channels, which allows it to further improve the renowned efficiency of Noctuas previous 92 mm models and contributes to the NH-D9l superior cooling performance. Dual fan ready. The NH-D9L includes an extra set of fan mounting clips for users who want to achieve even better cooling performance by adding a second, optional NF-A9 to the front fin stack. Using the y-cable supplied with the NF-A9 PWM retail fan, both fans can be connected to one CPU fan header.