SilverStone FTF5010B Non-LED LED Case Fan

50mm PWM: 0 - 4,500 RPM +/- 10% 12V: 4,500 RPM +/- 10% Speed reduction cable: 3,400 RPM +/- 10% 5V: 2,000 RPM +/- 10% 12V: 7.34 CFM Speed reduction cable: 5.91 CFM 5V: 3.33 CFM HDB 12V: 28 d BA Speed reduction cable: 20 d BA 5V: 16.5 d BA