https://www.reddit.com/r/Amd/comments/cbls9g/the_final_word_on_idle_voltages_for_3rd_gen_ryzen/
AMD explained this in the post above, There is an observer effect at the moment with some programs. Latest chipset drivers, bios and May 2019 windows 10 update, you should be below 1v on the ryzen plan when idling. The image in the link there shows a 3900 at 0.384v
I have read it.. I dont use HW to monitor. .also he stated that cpuz shows correctly.. nop not for me.. also even ryzen master shows 1.45+ vcore all the time.. honestly I think it might show real values.. what I want to say.. if it reacts every 1ms for workload, it might actually keep that vcore high.. like literally all the time.. the question is, will it degrade cpu over time? :S