https://wccftech.com/intel-core-i9-9900ks-october-launch-5-ghz-across-all-8-cores/

In addition to the Core-X announcement, Intel also announced at IFA 2019 that the Core i9-9900KS, 5 GHz all-core chip, will be available on retail shelves in October. No specific date was announced but with the Core i9-9900KS, Intel seems to be asserting that they can not only release a 5 GHz chip but also hit the advertised speeds as long as the CPU is running.

It’s no surprise that Intel is launching the Core i9-9900KS (S for Special Edition) at a time when AMD is having trouble keeping their Ryzen 3000 series lineup running at advertised clock speeds. AMD has since announced a boost frequency BIOS update which we will hear more about on the 10th of September.