Top Motor by Dynatron DF128015BM 80mm x 15mm 2 Ball Bearing 4 Pin PWM CPU Replacement Fan This is a great quality replacement 80 x 15mm PWM CPU fan! Dimensions: 80mm x 80mm x 15mm Connector: 4 Pin PWM Voltage: 12VDC 0.20A Max Max Speed: 2500 RPM Max Airflow: 31 CFM Bearing Type: Double Ball Max Noise 27 dBA