Mine idles under 1v at 29c. Make sure you have c states and cool n quiet enabled in the bios. You need the latest chipset drivers and use ryzen balanced profile in windows. There is a new ryzen master version out, you need that as well as it reports voltage better.
https://community.amd.com/community...te-5-let-s-talk-clocks-voltages-and-destiny-2
I've installed these with a 3700x, idle temps and clocks down however the voltage is still being reported as 1.48v in Ryzen Master.