Hi again,
First : I do not have your motherboard and your cpu.
So I am not sure. But I give to you a general infos.
You set the dynamic Vcore and use the touch Bios to read vcore voltage.
The DVID Vcore on that board should have + 0.000 to +0.640.
So at +0.000 that is stock vcore and anything over that is a + increase.
When you set dynamic vcore on auto it increase on it's own.
So now you can take it off auto and try for 4.8GHz at 1.39v vcore, if you want this.
Otherwise, choose 4.6 is correct. More sure.
It is much better to mount gradually. And check with the software.
If you want to give it a whirl, start with adding 1 multi at a time and see how much vcore you need to add.
Now use HWiNFO64, AIDA64 and CPU-Z for check temp and other infos. CPU-Z gives the VTTIO voltage.
If you go to over 1.39, it is at your risk, for cpu and motherboard... So make attention.
EDIT01: Your HeatSink : What is a Brand and model?
I hope help you...
Gloup_Gloup.