Some of the marketing materials for Intel’s upcoming 10th generation Core “Comet Lake-S” desktop processors has been leaked to the web. These leaked slides confirm the core counts as well as Thermal Velocity Boost frequencies. The series will start with the 10-core, 20-thread Core i9 processors, these will have a Thermal Velocity Boost of 5.3 GHz. The Core i7 series will be 8-core, 16-thread processors with TVB frequencies up to 5.1 GHz. The Core i5 lineup will a nice boost as Intel will enable HyperThreading for the first time in 8 generations. So for Core i5 you have 6-core, 12-thread chips with a TVB of 4.8 GHz.
Looking at these speeds we can assume that the Core i5-10600K will outperform the Core i7-8700K, the Core i7-10700K will outperform the Core i9-9900K. These will be nice increases in performance, but it all comes down to what Intel will price these parts at.