As we mentioned before, all Ryzen CPUs have unlocked clock multiplier, which means you can overclocking them just by changing its multiplier, as long as the motherboard has this feature.
Raising the core voltage to 1.35V, we were able to run the Ryzen 5 1400 at 3.9 GHz (100 MHz x 39) with tested stability on Prime95.
It may be possible to reach higher frequencies (even above 4.0 GHz) if you “play” with the available adjusts, as long as you have a good power supply, motherboard, and cooling system.
It is clear that the Ryzen 5 1400 has an excellent potential for overclocking. However, it is good to keep in mind that the overclock capability depends on pure luck, since two CPUs of same model can reach different maximum clocks.