Add additional chassis cooling with a 92mm ball bearing fan; This quiet dual ball-bearing (925cm) Case Fan offers a cost-effective solution for replacing a non-functional or noisy fan in your PC Powered through a simple TX3 connection to the host computer power supply the 8cm case fan helps keep your computer running at optimal temperatures for stable system performance;" A dual ball bearing design ensures reliability & longer life; Backed by a Star Tech 2-year warranty & free lifetime technical support; A built-in tachometer allows for easy monitoring of the fan performance"