Dynatron R23 2U LGA 2011 Sandy Bridge EP/EX CPU Heatsink Cooler - NEW CPU Socket: 2011 (Narrow Type, 56 x 94mm mounting pitch) CPU Support: Intel Sandy Bridge EP/EX Processors E5-1600 / E5-2600 / E5-4600 (for Narrow ILM Mounting Only) up to TDP 135 Watts Solution: 2U & Up Solution, Overall Dimension: 106.0 x 82.0 x 62.0 mm, Material: Vapor Chamber Base with AluminumStacked Fin