The AMD Ryzen 7 3800XT has graced 3DMark again, this on Time Spy. The processor has shown that it is capable of reaching 4.8 GHz, 300 MHz above the Ryzen 7 3800X. Improvements over even the Ryzen 7 3700X are negligible, though.
https://www.notebookcheck.net/AMD-Ryzen-7-3800XT-clocks-in-at-4-8-GHz-in-3DMark-Time-Spy-but-offers-minimal-improvements-over-even-the-Ryzen-7-3700X.468878.0.html