Isn't the SOC_Voltage the "all including" voltage and the mem controller a part of the soc?
I suppose they are on motherboards from other companies. But the ASRock motherboards all have separate settings for this. They have SoC_Voltage and two SoC_MC_Voltage settings.
Perhaps ASRock delivers power to the vcore through a separate electrical path than what they use to deliver power to the memory controller? If that's the case, then I hope it would still be safe to allow for 1.4V to the MC on their motherboards... But I am not sure yet as I am not too familiar with ASRock boards.
But, I will try lowering the MC_Voltage settings both to 1.3V tonight to see if my system still posts and works reliably with some memory and gaming tests.
Essentially, whenever I throw together a system on a platform I'm not too familiar with, I spend hours researching what the best motherboard would be for performance and reliability - and that is what lead me to purchasing the ASRock board that I recently did. I've been rocking with Intel stuff for the past decade and so I wasn't familiar with what would be best for AMD setups... I knew to stay away from Asus as they have had an absolute ton of manufacturing and reliability issues with their Intel boards for the past 2-3 years. MSI was creeping around the corner as the next big board company - but they were fresh to the turf with AMD boards as far as I knew at the time.
Anyway, my apologies for digressing here. I'm a huge geek over computer stuff and write too much stuff online because nobody understands this hobby IRL lmao.
Edit - I just reached out to ASRock support asking if their separate CPU SoC Voltage and Memory Controller SoC Voltage settings would prevent this issue from occurring. Granted, I have also noticed that they released a new BIOS version this morning (4/27/23) with a description stating that 7000X3D CPU users should upgrade to it... So, even though AMD didn't say so, perhaps the ASRock boards could've been affected by this issue as well... I suppose I'll find out tonight (once I flash the BIOS upgrade) or once someone from their support department responds to my support question.