Add additional chassis cooling with a 80mm ball bearing fanthis quiet dual ball bearing 8cm case fan offers a cost effective solution for replacing a non functional or noisy fan in your pcpowered through a simple tx3 connection to the host computer39s motherboard the 8cm case fan helps keep your computer running at optimal temperatures for stable system performance a dual ball bearing design ensures reliability and longer life a built in tachometer allows for easy monitoring of the fan p