Strix B650E-E BIOS 3201 / 9800X3D / Curve Optimizer Per Core not working

[McKinley]

Hello. I have the 9800X3D on the Strix B650E-E with BIOS 3201. The Curve Optimizer 'all cores' is working perfect. But the curve optimizer 'per core' is not working. If I set 8 different numbers to the 8 cores, all are working with same temperature and voltage (shown in HWINFO64). I've heard from other guys, that this is a known problem (general, not only for me). Can someone tell me, when this issue will be fixed?

[Silent_Scone]

Hi @McKinley 

Can you see if you're able to set it in the debug tool? Can you link posts where others are seeing the behaviour?

https://github.com/irusanov/SMUDebugTool

[McKinley]

No idea how to use this tool. Sorry.

[Silent_Scone]

Tool attached. Navigate to the PBO menu

[McKinley]

Thank you, Now I've found the program and just tested it. But unfortunately there is no effect: always same voltage, temps, power on all cores. This tool really works, fascinating, but only for each cores together 😞  same as when set in the BIOS directly. The cores somehow seem to be locked together and there is no possibility to treat them core by core separately.

[Silent_Scone]

Each core has its own voltage-frequency curve. If a single-threaded workload shift between cores dynamically, you may not notice differences as some cores can be "bound" together in terms of voltage.

There's a user guide here which may help. 

https://www.overclock.net/threads/amd-ryzen-curve-optimizer-per-core.1814427/#replies

[McKinley]

No, I think, that it really does not work yet with this CPU. There are two very experienced guys in a german hardware forum, that made the same experience as I do: Curve Optimizer 'per core' does NOT work for 9800X3D, new BIOS, on different motherboards. Try yourself and your will make the same experience. If You don't believe me I have no problem with it. But it's real. Check it. You can set anything. The 8 cores will always have same voltage. As shown in the following pics (system is near idle in every of the 3 examples). 0-3 are set different from 4-7 in every of this 3 examples, but the voltage is always exactly same for all 8 cores.

[McKinley]

Sorry, but marking as 'resolved' was an oversight. It's not resolved. But as I see You have no resolution for this problem as well. No problem for me. I wait for a new AGESA from AMD to really solve this issue. Thank your for trying to help me!

[Silent_Scone · Accepted solution]

I need to find time to test per core CO, but you need to stop looking at per-core VID, it's irrelevant.

If you're using B650 board, use the SVI3 telemetry. Use the information in the aforementioned link to try to isolate each core voltage using single-threaded applications. The OP uses Statuscore to isolate each core.

EDIT: I'm not saying this function is working as intended - but you can safely ignore per core VID

On your board, the SIO uses socket sense so the reading will be higher than what is reported by AMD's SVI3 telemetry.

[magix86]

Which  bios menu are you using ? Ai tweaking or amd overclocking ?