Enermax UC-8TCFS/B Ultra Cool 80 mm Fan W/Thermal Sensor Designed to cool down computer systems and subsystems UC-8TCFS/B comes with one 8 cm double sleeve bearing fan with 2 balls built-in Built-in thermal control for overheat detection 25C-1800 RPM / 22CFM-18dBA, 65C-2600 RPM / 33CFM-29dBA