nope with ryzen it's not a question of "high voltage" it's a question of intensity, every ryzen is 1,5V at idle , you see 1,47 and you assume that it goes higher in bios ? that's not logical , yes , i think you re tired 
... i was wondering : do you have a ryzen cpu ? i have a 3900x too , and had a 3700x before ... and before that had a intel 4930k oc at 4.7ghz , i think i know the differences ! lol
i just said he has better cooling because , i have 40-50° in my bios when windows is not started , even my mb temps are higher, it's just an indicator of where to start to worry
I just say I had exactly the same problem, and I know where to start to put things on default instead of trying to search anywhere else
and it's not because ram is 3600 that it is a default value for ryzen ... ryzen default value and RECOMMANDED value is 3200 for ram
hey xlox you right its probably about 4*8 quad kits speed problem in asus bios.. cos 2*8 (xmp + OC ) + 3900x ( before 3700x) was working pretty good
so last setting is working good now. i send a pic u can see
and also cpuz bench test are good , just rams on 2666
whats ur cpuz score?
can i should test 3200 or just stuck this settings?
whats ur opinion?
for you information if you go back to 2x8 kit (i tested it too) , you will probably experience the same problems now , but maybe less often ...in my view asus "improved ram stability" in new bios , but that is assuming your running them at recommdanded specs (3200)
as recommanded setting for ryzen 3000 is 3200mhz you can safely go to 3200 ... but confirm you have removed your enhanced performance setting too please because you have to start with base settings first
i just launched cpu-z , you have better scores than mine ... i'm actually 530 and 8082 (but my cpu z version is older too , so it's must be pretty much the same, ram won't change a lot to this figures)
downgrade bios to 2607
tested 1 hour no restart
Performance Level 2
xmp enable
let u know next restart 
i need 32gb ram at 3600 cos payed money and fast video sound edit
thank you
you are absoluty right
i wanna try my luck
maybe i ll not have this problem next 4 days
maybe thşs problem gonna cut my work
i m not good for manuel ram timing
i used a few days ryzen calculater with Hardawe Unboxed videos but its complicated for me
old bios 2607
xmp 2.0 enable
Performance Level 2
1 hour game 1 hour internet and i think 1 hour PC just was On. JUst HWinfo64 was on.
No retsart yet
by the way
SP Clock Spread Spectrum was not on bios menu earlier bios.
i sent mail Asus about this 100 mails or more
when u disable this your cpu raising base clock speed for example 3.80
if u enable this your cpu will be 3.79
high-end mobos had a this menu, disable / enable
but Asus Tuf and P, Pro series doesnt have
So Asus sended 1407 bios first to me in the world
than they realese it on Asus Page.
