Add additional chassis cooling with a 92mm ball bearing fan This quiet, dual ball-bearing (9.25cm) 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. The StarTech.com Advantage - A dual ball bearing design ensures reliability and longer life - A built-in tachometer allows for easy monitoring of the fan performance - Backed by a StarTech.com 2-year warranty and free lifetime technical support