StarTech.com 92x25mm Computer Case Fan with PWM FAN9225PWM (Black) PWM control enables the fan to be controlled by the motherboard according to current system requirements, ensuring optimal system performance Ever Lubricate bearing design increases reliability and lifespan over fans with a traditional sleeve bearing design Backed by a StarTech.com 2-year warranty and free lifetime technical support 4-pin Pulse Width Modulation (PWM) motherboard connector Ever Lubricate Bearing design Includes a PWM Y-split cable