text: LGA 2066, also called Socket R4, is an upcoming CPU socket by Intel that will debut with Skylake-X and Kaby Lake-X processors in June 2017. It replaces Intel's LGA 2011/2011-3 (Socket R/R3) in the performance and high-end desktop platforms (based on Basin Falls chipset), while LGA 3647 (Socket P) will replace LGA 2011-1/2011-3 (Socket R2/R3) in the server platforms based on Skylake-EX (Xeon "Purley").