Socket 754 is a CPU socket designed by AMD for its Athlon 64 and Sempron processors. Introduced in 2003, it supports single-channel DDR SDRAM memory and was primarily used in budget and entry-level systems. This socket marked a significant shift in computing, allowing 64-bit processing capabilities. While it has been largely replaced by newer sockets like Socket 939 and Socket AM2, Socket 754 played a crucial role in the transition to 64-bit computing in personal computers.