The Intel 300 series chipsets are a family of chipsets designed to support Intel's 8th and 9th generation Core processors. These chipsets provide essential features for motherboards, including support for high-speed memory, multiple USB ports, and advanced connectivity options like PCIe 3.0. Key members of the 300 series include the Z370, H370, and B360 chipsets, each catering to different user needs. The Z370 is aimed at enthusiasts with overclocking capabilities, while the H370 and B360 offer more budget-friendly options without overclocking support.