The SecuFirm2™ mounting kit NM-AM5/4-MP78 enables Noctua CPU coolers with 78-mm mounting pitch to be retrofitted for AMD AM5 and AM4 platforms. In true SecuFirm2™ fashion, it combines outstanding reliability, optimum contact pressure and easy installation, so that Noctua coolers can be reused on AMD's latest Ryzen processors. Note: Please note that the NM-AM5/4-MP78 set is only compatible with radiators with a mounting pitch of 78-mm, and that for radiators with a 83-mm mounting pitch, the NM-AM5/4-MP83 set must be used.