Intel hasn't yet launched the Core i7-6950X Processor Extreme Edition processor. However, at the weekend, Intel published a change-log for its latest Management Engine software on its support site. In the CPU support list for this application we got both the official confirmation of this impending 14nm 'Broadwell-E' chip plus a couple of key specifications too.
The Intel Core i7-6950X Processor Extreme Edition is expected to be the flagship of the Broadwell-E range. These 14nm LGS2011-v3 socketed processors succeed the 22nm Haswell-E parts. According to Tweakers.net, which provided the Intel website link above, the i7-6950X will be the first Intel client CPU with 10 cores. Due to the core-count increase it is expected to raise the flagship price, once capped at around EUR999, by a significant amount.
As you can see in the screenshot above, the official confirmed specs of the Intel Core i7-6950X Processor Extreme Edition processor include a 25MB L3 cache and a top boost speed of 3.5GHz. From previously leaked info, this 10C/20T processor is expected to have a 3Ghz standard speed, and support DDR4-2400 RAM. Furthermore as an 'X' suffix processor we can say with a good level of confidence that the i7-6950X will have 'eXtreme' unlocked multipliers and voltages.
The Core i7-6950X Processor Extreme Edition is expected to be released with other members of the family at Computex Taipei 2016, which kicks off on 31st May this year.