Fractal Design Silent Series R3 40mm Case Fan Fractal Design Silent Series R3 fans offer excellent value for money, with good performance and assured reliability. All Fractal Design Silent Series R3 fans are equipped with long-life rifle bearings and an easy-to-hide, sleek black cable.  Key features Featuring rifle bearings, providing improved life expectancy and lower noise compared to a standard sleeve bearing Black stealth ribbon cable, making it easy to hide the cable contributing to a clean build Improved, 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 and 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 [dB (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