The unannounced Ryzen 3 2300X is running at 3.5 GHz by default and can go up to 4 GHz via boost frequencies. On default air cooling it may be pushed to 4.3 GHz without any problems, but liquid coolers may be able to help push it even further. The processor managed to score 690 points in Cinebench R15, placing it right between Intel's i3-8100 and i3-8350K.
https://www.notebookcheck.net/AMD-s-Ryzen-3-2300X-budget-CPU-OC-potential-and-Cinebench-results-leaked.314024.0.html