Supermicro 2U twin server passive cooling kit (heatsink without fan) for Xeon 5600/5500 processors of Intel LGA1366 socket. Mfg. Part Number: Supermicro SNK-P0038PS, bulk. Features & Specifictions: Support Socket Type: LGA1366 Support CPU Model: Xeon® 5600/5500 Series Dimension (L x W x H): 90mm x 90mm x 64mm Mounting Method: Screw and Spring Fan Speed (RPM): N/A Noise (dBA): N/A Application: 2U twin servers