Scythe S-Flex 120mm Fan, 1900 RPM (SFF21G) Fan Speed: 1900 RPM, Noise Level: 35 dBA, Airflow: 75 CFM Rated Voltage: 12V Bearing Type: Sony Fluid Dynamic Bearing MTBF: 150,000 hours @ 25C Connector: 3-Pin (4-Pin adapter included)