INTEL S775 BTX CPU FAN HEATSINK Type II Intel Copper Core Socket 775 Heat Sink and Fan up to 3.0 GHz General Features: Copper Core Aluminum Heat Sink Supports Socket 775 Intel Pentium D processors up to 3.0 GHz BTX(Balanced Technology Extended) 3.25-inch fan 4-pin fan connector Regulatory Approvals: UL CE