The AMD Ryzen PRO 4750G has been spotted hitting 4.5 GHz in 3DMark. The eight-core APU also appears to have a GPU capable of reaching 2.4 GHz. Rumour has it that AMD may be planning to silently launch its Ryzen 4000G processors next month, too.
https://www.notebookcheck.net/AMD-Ryzen-7-PRO-4750G-hits-4-5-GHz-with-a-2-4-GHz-GPU-in-3DMark-amid-claims-of-a-silent-Ryzen-4000G-Renoir-processor-launch.476859.0.html