Cooler Master Socket LGA 775 Cooling Fan Rohs Heat Sink Dimension - 95x38 mm (Copper) Fan Dimension - 95x25mm Fan Speed - 0~ 4200+- 10% R.P.M. Airflow - 80.52 CFM / Voltage - 12 VDC / Noise - 19 dBA (Min.) Applications - Pentium 4 LGA775 3.8GHz and higher / Celeron D LGA775 3.46GHz and higher