The Intel 9 Series refers to a family of chipsets designed for Intel's 4th generation Core processors, known as Haswell. These chipsets, including the Z97 and H97, support features like faster data transfer rates and improved power management, enhancing overall system performance. The 9 Series also introduced support for DDR3 memory and included advanced connectivity options such as USB 3.0 and SATA Express. These features make the 9 Series suitable for gaming and high-performance computing, providing users with a reliable platform for various applications.