The specifications of the Intel Core i9-7980XE have just leaked on Videocardz. Here they are:
|Processor||Clock (GHz)||Boost (GHz)||Max (GHz)||Cores / Threads||L3 Cache||PCIe lanes||TDP||Price|
The most powerful processor in the Skylake-X range, the Intel Core i9-7980XE, will therefore have a base frequency of 2.6 GHz, compared to 2.8 GHz for the Core i9-7960X, 3.1 GHz for the Core i9-7940X and 2.9 GHz for the Core i9-7920X.
This is what everyone feared, the basic frequency of the i9-7980XE is very low. This is to avoid thermal problems.
The release of the Core i9-7920X is scheduled for August 14, 2017. The other 3 processors, according to the latest news, should be available in October 2017.
For all these processors, the supported memory is the DDR4-2666, the building scale is 14 nm, the socket is 2066.