All the Ryzen processors have unlocked clock multiplier, which means you can overclocking it just by changing its multiplier, as long as the motherboard has this feature.
We were able to configure the CPU to run stable at 4.050 GHz (100 MHz reference clock and x40.5 multiplier), with the original voltages, testing stability with Prime95. At 4.075 GHz, it resets after a few minutes running the stress test. It may be possible to reach higher frequencies if you “play” with the available adjusts, as long as you have a good power supply, motherboard, and cooling system.
With this overclocking, the CPU reached 2,620 points on CineBench R15, which means a 7.7% improvement on performance over stock clock.
It is also good to keep in mind that the overclock capability depends on pure luck, since two CPUs of same model can reach different maximum clocks.