Intel Socket 775 Aluminum Heat Sink & 3.5" Fan w/4-Pin Connector up to Core 2 Duo 3.1GHz Intel Socket 775 Heat Sink and Fan General Features: Aluminum heat sink 3.5-inch fan Supports Intel Core 2 Duo Socket 775 CPUs up to 3.1 GHz 4-pin connector (12-inch cable length, approximate) DC12V, 0.14A Regulatory Approvals: UL CE