The IMC of the i7-7700K will be clocked at 4.00 GHz, and its integrated graphics core will feature 24 execution units, much like "Skylake-D." The cache setup is unchanged, too, with 256 KB per-core L2, and 8 MB shared L3 caches. The "Kaby Lake" silicon will be built on Intel's 14 nm node, and is rumored to be slightly more energy-efficient than "Skylake." It will be built in the LGA1151 package, and will be compatible with current Intel 100-series and future 200-series chipset motherboard.
Source: TPU