The Antec TriCool 120 LED case fan is a variable speed (1200/1600/2000RPM) 120mm fan that moves a lot of air (39/56/79 CFM). It comes with 3 and 4 pin connectors so you can connect it to either your motherboard or your power supply. The red LEDs provide a menacing glow to your system. Its double ball bearing motor will last longer than older fan motor designs. RPM: 1200 / 1600 / 2000 RPM Air Flow: 39 / 56 / 79 CFM Noise Level: 25 / 28 / 30 dBA Power Connector: 3 / 4 Pin Color: Transparent Compatibility: Case Dimensions: 120 x 120 x 25mm Features: 3-speed switch lets you balance quiet performance with maximum cooling 3-pin and 4-pin power connectors provide convenient connections to your motherboard or power supply Fan-speed monitoring capability included (requires compatible motherboard)