Noctua NF-A6 x 25 PWM 60 MM Fan 3000 rpm to 5 Volt, black With Noctua's AAO technology The NF-A6 x 25 5 V PWM has the latest technology of Noctua renowned quiet and efficient summits of category Ideal for use in various 5 V-based and pwm-enabled devices that require a good cooling, but with the maximum quietness Included are also the adapter, OmniJoin Adaptor Set Noctua provides additional modular cabling NF-A6x25 5V PWM Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and an AAO frame, the NF-A6x25 5V PWM is a PWM-enabled 5V variant of Noctua's highly optimised, premium-quality quiet 60x25mm fan. The custom-designed NE-FD1 PWM IC that integrates Smooth Commutation Drive technology and Noctua's reference-class SSO2 bearing guarantee superb running smoothness and excellent long-term stability. Many devices, such as network or storage solutions, use 5 volt 60mm fans with PWM speed control. With the same operating voltage, PWM support and the included OmniJoinTM adaptor set that makes it compatible with proprietary fan headers, the NF-A6x25 5V PWM is ideal for replacing noisy or broken 5V 60mm fans with PWM. Important Noctice Being a 5V fan, the NF-A6x25 5V cannot be run at 12V and will be damaged when used with typical 12V power sources such as PC motherboard fan headers.