SoC voltage 5800x3d on b550 taichi

hello @bestsss

if soc voltage does not change, then ENABLE "UNCORE soc". Theres also somewhere else deeper than can change soc volts. Don't rely on the one outside alone.

regarding the good question of "whats the expected behaviour?" long story short, some bioses version does not contain enough library as well as enough rules to "AUTO setting" so many brands/parts ........

hence the solution is to understand XMP properly, and become smart-consumer-ship enough to see/find/identify which bios does not do what versus which bios will do what...

i.e.

version 1 bios - can fully load XMP, but voltage not auto correctly
version 2 bios - can't XMP, but voltages are correct fully,
version 3 bios - load primary XMP with secondaries but will auto calculate secondaries to different values, then half voltages correct, half voltages wrong.
version 4 bios - everything correct perfect.

trust me, I used x370-taichi bios 2.0, then 3.0 something, then start to log-book in details 4.6, 4.8, 5.1, 5.5, 5.53, 5.6, 5.61, 5.64, 5.66, 5.67, 5.8, 5.93, 5.95, 6.2, 6.2A, 6.4, 6.61, 6.62, after these I jump ship to x470 taichi 3.43, 3.46, 3.5, 3.6, 3.75, 3.78, 3.9, 3.92, 4.1, 4.2, 4.6, 4.62, 4.7, 4.73, 4.75, 4.76, 4.85, 4.8, 4.9, 8.01
trust me, most are type 3.

type 3 bios gives most convenience, most users can boot XMP into windows and use a few days, but later crash when heavy load either gaming, or crash when idling doing nothing....

regardless, solution for zen3, zen2, [not zen4], following recent default voltages below
soc 1.1v
cldo_vddp 1.0v
VDDG_IOD 1.1v
VDDG_CCD 1.1v
procODT 43.6 ohms

when I use these voltages, even OLD bios get 100% stable, why? because year 2017 first few batches of bios gives below voltages

soc 0.9v
cldo_vddp 0.7v
VDDG_IOD 0.9v zen2 start, zen1 don't have this
VDDG_CCD 0.9v zen2 start, zen1 don't have this
obviously many crashes when runing XMP.
These low voltages are for jedec 2133MT/s 1066Mhz.

for real user case see
https://forum.asrock.com/forum_posts.asp?TID=24829

https://forum.asrock.com/forum_posts.asp?TID=25034

and some bioses does not save settings after wall-plug-power-off, like x470-taichi beta 3.46 and 3.50 although I suspect flash too many bios, some codes left befind dirty ...... oh yes this happens ........

also loadline level 3 or higher gives better stability, less vdroop, less power savings.

What about VSOC? Voltage for Infinity Fabric with Ryzen 5800X3D?

Other OEM's have this setting available and it can be changed ... with a 5800X3D onboard.

Anyway in my specific case, I am looking to down-volt, so no danger on the CPU.

I have a Taichi X570 and as colleagued mentioned above, there is no vcore option in bios. Also Windows software A-Tunning does not have available an option for vsoc.

Yeah, seems to be locked. Is there anyone from AsRock to support here? I mean for other motherboard OEM's this settings are enabled.
I do not see why it shouldn't work for AsRock mobo's.

Anyway I am looking to stabilize some ram OC and I will actually look to lower the vsoc, so no intended harm on my 5800x3d CPU.

infonity fabric doesnt rely on vsoc/uncore voltage, its vddg iod voltage