The Intel 300 Series chipset is a family of chipsets designed to support Intel's 8th and 9th generation processors, known as Coffee Lake. These chipsets enhance system performance and connectivity, offering features like support for faster memory and multiple graphics cards. They are commonly used in desktop and laptop motherboards. 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 are more suited for mainstream users, providing a balance of performance and cost.