The new Core i9 range based on Skylake-X was leaked last week. Now some benchmarks have also been leaked. While these don't show much yet, they do confirm the i9 line. In this leak, we also learned of the new Kaby Lake-X i7 line.
Core i7-7740K: 4C/8T, 4.3GHz to 4.5GHz, 8MB cache, 112W, 16 PCIe lanes
Core i7-7640K: 4C/4T, 4GHz to 4.2GHz, 6MB cache, 112W, 16 PCIe lanes
Core i9-7920X: 12C/24T, unknown clocks, 16.5MB cache, 140W, 44 PCIe lanes
Core i9-7900X: 10C/20T, 3.3GHz to 4.3GHz, 13.75MB cache, 140W, 44 PCIe lanes
Core i9-7820X: 8C/16T, 3.6GHz to 4.3GHz, 11MB cache, 140W, 28 PCIe lanes
Core i9-7800X: 6C/12T, 3.5GHz to 4GHz, 8.25MB cache, 140W, 28 PCIe lanes