Noctua NF-A12X25 5V 1900RPM 120mm Ultimate Quality Quiet Fan\n\nThe NF-A12x25 5V is a dedicated 5V version of Noctua's award-winning; premium-quality NF-A12x25 120mm fan. Featuring an AAO (Advanced Acoustic Optimisation) standard frame and sophisticated aerodynamic design measures such as Flow Acceleration Channels; the NF-A12x25 is renowned for its superior performance and outstanding quietness of operation. Smooth Commutation Drive technology and Noctua's reference class SSO2 bearing guarantee superb running smoothness and excellent long-term stability. Topped off with the included USB power adaptor cable; OmniJoin adaptor set and 6-year manufacturer's warranty; the NF-A12x25 5V is a premium choice for demanding 5V applications.\n\nPLEASE NOTE: Being a 5V fan; the NF-A4x10 5V cannot be run at 12V and will be damaged when used with typical 12V power sources such as PC motherboard fan headers.\n5V version 5V fans are used in various devices and applications. With the included USB pow;