The NM-AM5/4-MP83 is a SecuFirm2 mounting upgrade kit that allows Noctua CPU coolers with 83mm mounting pitch (see detailed compatibility information) to be upgraded to AMDs AM5 and AM4 platforms. True to the SecuFirm2 tradition, it combines outstanding reliability, optimal contact pressure and easy, straightforward installation in order to enable Noctua users to continue using their heatsinks on AMDs latest Ryzen processors.