Cooler Master Socket 478 Aluminum Heat Sink & 2.75" Ball Bearing Fan w/3-Pin Connector up to 2.8GHz Cooler Master Socket 478 Aluminum Heat Sink Fan General Features: Aluminum heat sink 2.75-inch fan Ball Bearing type 3300 RPM fan speed 28.18 CFM air flow 31 dBA noise level 12V voltage 40,000 hours fan life expectancy 2U Active solution application system 8-inch 3-pin power connector Supports Intel Pentium 4 (Northwood/Prescott) Socket 478 processors up to 2.8 GHz