IgorsLAB published Does AMD with Zen3 still crack the 5 GHz barrier? Even faster engineering sample of the 16-core with 4.9 GHz appeared A quote from the article:

Sometimes you cant keep up with the news at all, because two more Engineering Samples (ES) have turned up, whose OPN contains interesting details about the targeted clock rates. These two OPNs also stand for the new 16-core CPUs CPUs from the already known B0-Stepping.

  Does AMD with Zen3 still crack the 5 GHz barrier? Even faster engineering sample of the 16-core with 4.9 GHz appeared