Chipset

https://www.amd.com/en/products/chipsets-am4 - B550: PCIe® 4.0 Ready for AMD Ryzen™ processors

https://en.wikipedia.org/wiki/Socket_AM4

APU

Accelerated Processing Unit (APU): AMD processors with 3D graphics - https://en.wikipedia.org/wiki/RDNA_2#Integrated_graphics_processors_(iGPs)

CPU

Generation Sockets Desktop APUs Mobile Release date
Zen 2 7nm/AM4 3100/4500 4300G 4300U 2019/2020
Zen 3 7nm/AM4 5500 5300GE 5400U 2020
Zen 3+ 6nm - - 6600U 2022
Zen 4 5nm/AM5 7600 any? 7440U 2023