Fractal Design Dynamic GP-12 Black case fan FD-FAN-DYN-GP12-BK Featuring hydraulic bearings; a cost-efficient compromise between a standard sleeve bearing and a true FDB bearing Equipped with a counter-balancing magnet in the hub that reduces the axial tension on the bearing, further protecting the longevity of the bearing Optimized fan geometry for a good balance between static pressure and maximum airflow, resulting in good performance in all usage scenarios The customized design of the Dynamic Series fans contributes to a beautiful, cool build