Core i9-7920X 12C/24T 16.5MB L3 44 PCIe lanes Clocks TBD (August Launch) Core i9-7900X 10C/20T 13.75MB L3 44 PCIe Lanes 3.3Ghz Base 4.3Ghz Turbo 2.0 4.5Ghz Turbo 3.0 Core i9-7820X 8C/16T 11MB L3 28 PCIe Lanes 3.6Ghz Base 4.3Ghz Turbo 2.0 4.5Ghz Turbo 3.0 Core i9-7800X 6C/12T 8.25MB L3 28 PCIe Lanes 3.5Ghz Base 4.0Ghz Turbo 2.0 Core i7-7740K 4C/8T 8MB L3 16 PCIe Lanes 4.3Ghz Base 4.5Ghz Turbo 2.0 Core i7-7640K 4C/4T 6MB L3 16 PCIe Lanes 4.0Ghz Base 4.2Ghz Turbo 2.0 - L2 cache = 1MB (Skylake-X), 4x as much as Core i7-7700K - Dual DDR4-2666 for Kaby Lake-X / Quad DDR4-2666 for Skylake-X - 112W for Kaby Lake-X / up to 140W for Skylake-X - Apparently all Core i9 parts support AVX-512 (TBC) - Launch in June, except 7920X (August) https://forums.anandtech.com/threads/intel-skylake-kaby-lake-thread-6c-12t-coffee-lake-launching-august-2017.2428363/page-417#post-38889905