Continuing Noctuas tradition of supplying customers with its premium-class SecuFirm2 mountings free of charge, the NM-AM4-UxS kit allows Noctua users to upgrade NH-U14S, NH-U12S and NH-U9S coolers to AMDs AM4 socket (Ryzen). It is a dedicated solution for the NH-U14S, NH-U12S and NH-U9S models and has been designed to combine outstanding reliability, optimal contact pressure and easy, straightforward installation. Bringing the trusted SecuFirm2 quality to AMDs AM4 platform, the NM-AM4-UxS is an enthusiast-grade mounting kit that meets the highest demands in safety, performance and ease of use.The NM-AM4-UxS kit is compatible with the NH-U14S, NH-U12S and NH-U9S only (please choose the NM-AM4 kit for other models).NOTEOwners of Noctua NH-U14S, NH-U12S and NH-U9S CPU coolers can obtain the NM-AM4-UxS Mounting-Kit free of charge via this link http://noctua.at/en/nm-am4-uxs-mounting-kit-order-form. A proof of purchase (electronic version, photo or scan of the invoice) of both a Noctua CPU cooler and either a socket AM4 mainboard or socket AM4 CPU are required.The NM-AM4-UxS SecuFirm2 mounting-kit is also available for purchase at some of our resellers. If you need the kit urgently, please consider ordering it via a local reseller.Kit Specification:- Socket compatibility: AMD AM4Cooler compatibility:- NH-U14S- NH-U12S- NH-U9S