, sorted it
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Looking for feedback on others using SOC overclock VID.
The ASUS UEFI based on a "autorule" increases SOC if left on [Auto] mode. Using Manual mode and the value for manual as [Auto] I still had ASUS "autorule" overiding the manually set VID in AMD CBS menu. If I changed the manual value in manual mode to say 0.900V and had AMD CBS as 0.993V it was being overidden by my manual set value on Extreme Tweaker.
The only way I have SOC overclock VID being the set value is if use SOC as Offset mode with [Auto] offset.
Here is The Stilt's post on setting this value, link
59 = ~0.984V for me as measured on DMM via Probeit point, 56 = ~1.003V, 52 = ~1.025V and 4E = ~1.05V.