Add additional chassis cooling with a 80mm ball bearing fan; This quiet dual ball-bearing (8cm) 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&s motherboard 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; A built-in tachometer allows for easy monitoring of the fan performance; Backed by a Star Tech 2-year warranty & free lifetime technical support