The rumored details come from Chiphell Forums (via HXL) where one of the members has posted the clock speeds for all three AMD Ryzen 'Matisse Refresh' processors.
The refresh Ryzen 3000 lineup would include three CPUs which are listed below:.
All three AMD Ryzen 3000 'Matisse Refresh' CPUs will feature higher base clocks than Intel's 10th Gen desktop CPUs if this rumor is correct.
It will also be interesting to see how well the new Matisse Refresh CPUs handle their boost clocks considering AMD had to release several fixes for the original lineup for them to touch advertised clock speeds.
The new Ryzen 3000 CPUs will be priced the same as existing parts while the original Matisse chips will be getting huge price cuts.