Supermicro 2U Active CPU Heat Sink Socket LGA1155/ LGA1156 (SNK-P0074AP4) This CPU fan heat sink is designed for Supermicro 2U servers/workstations equipped with Intel® Xeon® Processor E3 Family, Xeon® Processor 3000 Sequence. The heat sink has been fully tested and validated by Supermicro to ensure the best quality and cooling performance.