Dynatron T318 for IntelĀ® Sandy Bridge Romley-EP/EX Narrow ILM Processors up to TDP 135 Watts Vapor Chamber CPU Cooler for socket 2011 1U Server Solution - Retail Type: Heatsinks only Heatsink Material: Vapor Chamber Base with Copper Stacked Fin Compatibility: Intel Sandy Bridge EP/EX Processors E5-1600 / E5-2600 / E5-4600 (for Narrow ILM Mounting Only) up to TDP 135 Watts Weight: 1.05 lbs