Noctua is among the first CPU cooler manufacturers to develop a retention kit for the upcoming AMD socket AM4. There are three versions of this, compatible with all existing Noctua coolers, except D0 series and NH-L9i series. This means that even 10-year old heatsinks from Noctua should be able to cool next-gen AMD chips. Noctua will be giving these away for free to all existing customers (proof of purchase required).