Cooler Master X6 Elite - CPU Cooler with 6 Heat Pipes and Honeycomb Fin Structure (RR-X6NN-18PK-R1) Unique honeycomb fin structure achieves maximum surface area coverage and cooling performance Heatsink base and fins angled for better cold air intake from chassis fans - creating optimal air flow and heat dissipation Easy installation with a quick-snap fan bracket design Extra air flow provided by a special air duct Wide range PWM fan (600 - 1800 RPM) providing versatile performance while idle and at full load Compatible CPU Sockets - Intel: LGA 2011/1366/1156/1155/775 and AMD: FM1/FM2/AM3+