Specifications are revealed of three Coffee Lake processors. Take this with a grain of salt as it may not be entirely accurate, or could differ from the the final retail product.
Via: TPUCore i i7-8700K: 3.7GHz base clock, 4.0GHz Boost for four and six cores, 4.2GHz Boost for two cores, 4.3GHz Boost for single core, 95W TDP.
A second six-core model is clocked at 3.2GHz and has a 3.4Gz Boost for four and six cores and a 3.6GHz Boost for a single or two cores. This model has a 95W TDp and may be unlocked K-series part.
The third six-core chip is a 65W model chip with a 3.1GHz base clock, four and six core Boost of up to 3.9GHz, dual-core Boost of 4.1Gz and single-core Boost of up to 4.2GHz. This could be an Core i7-T series chip