Socket LGA-1151 (Socket H4 or LGA14C) is the socket used by Intel for their Skylake, Kaby Lake, and Coffee Lake-based processors. This socket accepts Intel's 1151-pin flip-chip land grid array (FCLGA-1151) packages. This socket is used for Intel's 6th generation, 7th generation, and 8th generation Core, Pentium, Celeron, Xeon E3, and Xeon E processors. This socket comes in two distinct versions which are NOT compatible with each other.