FeaturesThe Delta 120mm x 38mm Extreme Speed Fan moves more air through one 120mm hole than is move through most computer cases. At 120.07 CFM, your cooling problem is solved and you can overclock to your heart's content. The fan is hardly quiet, with its blades spinning at 2900 RPM it puts out 44 dBA of noise. The fan has RPM TAC output through its standard 3 Pin power connector.