At Duty Cycle 0-20%: 700 RPM At Duty Cycle 50%: 1400 RPM At Duty Cycle 100%: 2500 RPM At Duty Cycle 0-20%: 14.98 CFM At Duty Cycle 50%: 29.90 CFM At Duty Cycle 100%: 46.96 CFM Aluminum Radial Fin Heatsink with Copper Inserted