The AM4 socket is a type of CPU socket used by AMD for its Ryzen and Athlon processors. Introduced in 2016, it supports a wide range of processors, allowing users to upgrade their systems without changing the motherboard. This socket is compatible with various chipsets, including B350, X370, B450, and X570, providing flexibility for different performance needs. The AM4 socket features a pin grid array design, which helps ensure a secure connection between the CPU and the motherboard, enhancing overall system stability.