AM4 vs AM5. Simply put, AM5 is the latest step in the evolution of AMD's line of Ryzen processors, as well as their chipset. The AM5 chipset is designed to support a diverse range of processors and motherboards. The number of available processors and motherboards that support AM5 is constantly growing, but AMD has released an official list of supported processors and motherboards. AM5 is compatible with AM4 motherboards, but it's also compatible with some of the older AM4 motherboards. AM5 motherboards support the same features as AM4 motherboards.