Fractal Design Silent Series R3 40mm Case Fan Fractal Design Silent Series R3 fans offer excellent value for your money, with good performance & assured reliability. All Fractal Design Silent Series R3 fans are equipped with long-life rifle bearings & an easy-to-hide, sleek black cable. Key features Featuring rifle bearings, providing enhanced life expectancy & lower noise compared to a standard sleeve bearing Black stealth ribbon cable, making it easy to hide the cable contributing to a clean build enhanced, more balanced, sturdy fan design delivering precision at a good price point Low fan speeds, optimized for quiet operation Featuring Fractal Design’s signature black & white color scheme Offering sizes from 40mm up to 140mm for all your build needs Specifications Fan Silent Series R3 40mm Size [mm] 40*40*10mm Colors available White blades, black frame Screw hole pattern 32*32mm Connector 3-pin fan header Bearing Rifle Number of blades 7 Rotational speed [RPM] 4000 Acoustical noise [d B (A)] 20.0 Maximum air flow [CFM] 3.6 Maximum pressure [mm H2O] 1.24 Actual input power [W] 0.4 Maximum rated input current [A] 0.05 Nominal input voltage [V] 12 Minimum startup voltage [V] 7 MTBF [hours] >40, 000 Unit weight [g] 19 Package weight [g] 55 Cable length [mm] 350 Cable type Black ribbon cable