Delta AFB1212HHE-F00 120mm Case cooler The 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. The fan is hardly quiet, with its blades spinning at 2900 RPM it puts out 44 dBA of noise - a small price to pay for astronomical air flow. The fan has RPM reporting through its standard 3 Pin power connector.