The NM-TR5-SP6 is a SecuFirm2™ mounting kit that enables the installation of Noctua's DX-4677, DX-4189, DX-3647 and TR4-SP3 series coolers to AMD sTR5/SP6 sockets for Epyc line server and Threadripper line workstation CPUs. While the brackets and springs have been updated to meet the increased pressure requirements of the new sTR5/SP6 socket, installation is just as easy as on the previous generation: Put on the heatsink, fix the four spring-loaded Allen key screws using the supplied tool and you're done! Caution: The NM-TR5-SP6 is only compatible with DX-4677, DX-4189, DX-3647 and TR4-SP3 series coolers and cannot be used with any other cooler models. https://elecena.pl/product/26327829/nm-tr5-sp6-noctua-nm-tr5-sp6-mounting-set 2024-07-17 https://elecena.pl/product/26327829/nm-tr5-sp6-noctua-nm-tr5-sp6-mounting-set 2025-10-31