I re built my rig last Friday 21st with a 7800x3d, Asus Strix x670e and 32Gb (2x16Gb) Corsair c30 6000Mhz ram.
I naturally updated my bios to the then current 1104, Set Expo I and PBO and that was it, I left everything else on auto.
I was really impressed with the 7800x3d as it was boosting nicely to between 4.9/5.2Ghz, I have a custom loop cooling the CPU only.
The Vcore never went above 1.25 which I thought was really good, the temps never went above 52c under heavy gaming load.
After reading this thread on Sunday 23rd, I checked my SOC voltage and it read 1.41! I quickly checked for the bios update and downloaded the now current 1202.
After the update I noticed the Vcore was showing 1.15 and SOC was 1.05 also so I re set Expo I and PBO but this time manually set my SOC to 1.15, VDDIO 1.15 and Dram to 1.38, Vcore has been removed so I can't tweak that.
After booting in I've noticed that my Vcore is still around 1.25 peak but my SOC is now 1.17 & Dram to 1.39, I've also noticed I'm only boosting to 5050Mhz peak and my temps have dropped to 48c peak, which is nice.
I will monitor my systems health and check daily for bios updates, I'm loath to drain down and check the CPU, it's a bit of a pain.
Thank you OP for bringing this up so quickly.
**EDIT**
Just seen there is a new Beta update 1301. I'll wait till it's out of Beta before I update again.