Noctua NM-I3 Mounting Kit for Noctua CPU Coolers Ultimate Reliability: Renowned for their excellent reliability, minimize the stress on mainboards and make it possible to transport the system without uninstalling the CPU cooler Simple install: installs on top of stock LGA1366/LGA1156 backplate Integrated Fastening Brackets: no more fiddling with screws & springs Maximum Convenience for Enthusiasts: two screw access to socket for easy cpu change Backwards Compatibility: with all Noctua coolers since 2005, making them safe long-term investments that can be used for several CPU generations.