Prolimatech Blue Megahalems CPU Cooler Stylish blue matte finish. Minimal air resistance between fins allowing for the best balance between noise and performance. For maximum performance, fan RPM at 1600 or above is recommended. Heatpipes are lined up in a straight line to prevent air back draft allowing air to easily pass through the heatsink body. Intel Socket LGA 775/1366/1156/1155/1150/2011. (Socket for AMD sold separately) Includes easy-to-apply high grade Pk-2 thermal compound.