 All supported processors use the LGA 2011-v3 socket.The X99 chipset was released in late August 2014, while the supported processors were released in late August 2014 (Haswell-E) and early September 2014 (Haswell-EP).In May 2016, X99's processor support was extended to the Broadwell variants of the Intel Core i7 Extreme and Intel Xeon E5-16xx v4 and E5-26xx v4 processors, which belong to the Broadwell-E and Broadwell-EP variants of the Broadwell microarchitecture, respectively.