FC120 narrow frame bezel provides an increased area for strongerl heat dissipation Full load 1800RPM with 61.91CFM air flow each fan builds efficient PC case cooling system Daisy chained fans designed for better cable management in computer case without mess inside FC120 PC fans 5V-3Pin RGB build a fabulous world of lights just like the way you want RGB can be controlled by motherboard software without installing additional fan controller APP Noise damping pads in fans avoid vibration keep noise level under 28dB(A) in full load mode 4-Pin PWM PC fans matain balance between silence and performance to suit different needs