MANUFACTURER LINK : www.dynatron-corp.comPRODUCT OVERVIEWS:Recommend for Intel Xeon 5500 Series Nehalem EP Processor Model# W5580, X5570, X5560, X5550, E5540, E5530, E5520, E5506, E5504, E5502, L5520, L5506Socket LGA1366Passive cooler for 2U Servers & UpDimension: 90.0 x 90.0 x 64.0mmWeight: 490gMaterial: Copper Base with Aluminum Stacked Fin plus 3 Heat PipesBack Plate is not includedThermal Grease Pre-Printed with GE-Toshiba TIG830SPSupport CPU Power up to 130 Watts, with Rca 0.200 C/W refer to 30CFM wind tunnel air flowMANUFACTURER PARTS NUMBER: G618 PRODUCT SPECIFICATION: CPU Socket 1366 CPU Support Intel Xeon 5600 series Westmere Processor X5680, X5677, X5670, X5667, X5660, X5650, E5645, E5640, E5630, E5620, L5640, L5638, L5630, L5618, L5609 & 5500 Series Nehalem EP Processor W5580, X5570, X5560, X5550, E5540, E5530, E5520, E5506, E5504, E5502, L5520, L5506, L5518, L5508 Solution 2U Overall Dimension 90.0 x 90.0 x 64.0 mm Material Aluminum Stacked Fin with Heat Pipes and Copper Base Note 1. Backplate is not included 2. RoHS Compliance Every effort has been made to ensure the accuracy of all information contained herein. aaawave.com & associated makes no warranty expressed or implied with respect to accuracy of the information, including price, product editorials or product specifications. Product and manufacturer names are used only for the purpose of identification.