Dynatron A31 80mm 2 Ball CPU Cooler

At Duty Cycle 20%: 1500 +/- 200 RPM At Duty Cycle 50%: 4000 +/- 10% RPM At Duty Cycle 100%: 8000 +/- 10% RPM At Duty Cycle 20%: 8.85 CFM At Duty Cycle 50%: 21.88 CFM At Duty Cycle 100%: 43.75 CFM Copper1100 Heatsink with Vapor Chamber Base