StarTech.com 80x25mm Ball Bearing Quiet Computer Case Fan w/ TX3 Connector FAN8X25TX3L. 80 x 25mm Ball Bearing Quiet Computer Case Fan. Plugs in via a standard 3-pin fan power slot on your motherboard. 80mm in size, 2000rpm, 3-PIN. 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 power supply, the 8cm case fan helps keep your computer running at optimal temperatures for stable system performance.