Characteristics and Interoperability The TURBINE FC-124 Computer Case Fan features a dual ring design with no blank spots and an auto roll RGB spectrum effect. Computer Case Fan TURBINE FC124 with Auto Rolling RGB Modes anti-vibration Nine Pieces of Blades Noise level of a 12cm fan is 19.5dB. SILICON PAD WITH AUTO ROLL RGB SPECTRUM EFFECT TO REDUCE VIBRATIONS Dual Ring Design eliminates the need for a controller or remote control