AMD's eagerly anticipated second-generation Ryzen 7 2700X octa-core has been given the overclocking treatment ahead of its official launch this month. Two early testers were independently able to achieve overclocking speeds of 4.3 GHz across all eight cores.
https://www.notebookcheck.net/AMD-Ryzen-7-2700X-gets-pre-release-overclocking-treatment-up-to-4-3GHz.296604.0.html