Dynatron P520 2U Passive CPU Cooler with Aluminum Extrusion Socket 775 Intel CPU Socket LGA775 Passive Server Cooler for 2U and up Support CPU power up to 95Watts Dimension: 90.0mm x 85.0mm x 64.0mm Overall Weight: 410g +/- 5g Heat Sink Material: Aluminum Fin Type: Extrusion Fins Screen-On Thermal Grease Back Plate DY-PBK-P5G Included to meet all M/B requirement