explains Roland Mossig (Noctua CEO).After introducing the NM-AM4-UxS kit (for NH-U14S, NH-U12S and NH-U9S) and the NM-AM4 kit that supports most other retail cooler models (NH-C12P, NH-C12P SE14, NH-C14, NH-C14S, NH-D14, NH-D14 SE2011, NH-D15, NH-D15S, NH-D9L, NH-L12, NH-L9x65, NH-U12, NH-U12F, NH-U12P, NH-U12P, SE1366, NH-U12P SE2, NH-U9, NH-U9B, NH-U9B SE2, NH-U9F) in January, the new NM-AM4-L9aL9i kit for the NH-L9a and NH-L9i low-profile coolers completes Noctua’s line-up of AM4 upgrade kits. Just like the other two kits, the NM-AM4-L9aL9i has been tailor-designed for the new socket in order to ensure optimal compatibility, perfect contact pressure and easy, straightforward installation. Thanks to the three kits, every Noctua retail CPU cooler manufactured since 2005 can be upgraded to the AM4 socket of AMD’s Ryzen platform free of charge.In addition to the free mounting upgrade kits, Noctua introduced the NH-D15 SE-AM4, NH-U12S SE-AM4 and NH-L9x65 SE-AM4 special edition coolers in February. These models support the AM4 socket out of the box and are therefore the perfect choice for users who purchase a new CPU cooler for their AM4-based systems.In order to obtain the NM-AM4-L9aL9i kit free of charge via Noctua’s website, users are required to upload a proof of purchase (electronic version, scan or photo of the invoice) of an AM4 motherboard or AM4 CPU as well as a Noctua NH-L9a or NH-L9i CPU cooler. Users who have lost the invoice for their Noctua cooler may write their full name and the current date on a piece of paper, take a photo of the paper next to their cooler and upload it as proof of purchase. Depending on the user’s location, shipping will usually take 1–4 weeks.For users who need the kit urgently or do not yet have a proof of purchase of an AM4 CPU or motherboard, the NM-AM4-L9aL9i kit will also be available via selected retailers and e-tailers such as Amazon at a suggested retail price of EUR 7.90/USD 7.90.Designed in Austria, Noctua's premium cooling components are internationally renowned for their superb quietness, exceptional performance and thoroughgoing quality. Having received more than 6000 awards and recommendations from leading hardware websites and magazines, Noctua's fans and heatsinks are serving hundreds of thousands of satisfied customers around the globe.