Intel’s new Skylake-X processors span the Core i5, i7, and i9 families, but all drop into the same LGA 2066 interface, enabled by the X299 chipset. They're aimed specifically at high-end desktop users who need anywhere from four to 18 physical cores. Meanwhile, existing Skylake-S processors soldier on, popping into LGA 1151-equipped motherboards for mainstream desktops.