ASRock Taichi X399 CPU voltage settings

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   Hello, 

i have a Taichi X399 together with an Threadripper 1900X and  a quad kit G.Skill Trident ZF4-3200C14Q-64GTZ.

Getting more and more familiar with the bios (1.60) settings, i noticed that the cpu core voltage idle stays always at around 1,4V. Under prime95 it drops at around 1,25V. 
So i changed the settings in the bios - cpu voltage at 1,325V und a LLC of level 3.
Read out with HWINFO64 the results are the same, 1,4V idle and 1,25V under load.
And the values are changing / fluctuating constantly, idle from 1,313 to 1,42, under load from 1,19V to 1,29V.  With LLC 2 the same, with cpu voltage under 1,3V the same.

Is this a normal behavior? It seems that my manual settings in the bios have no effect.
Everything else works fine without any errors.

Thanks
Marcus 

Edited by OceanBlue72 - 23 Sep 2017 at 5:58am

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OceanBlue72 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Jan 2016 Location: Munich Status: Offline Points: 58	Post Options Post Reply Quote OceanBlue72 Report Post Thanks(0) Quote Reply Topic: ASRock Taichi X399 CPU voltage settings Posted: 23 Sep 2017 at 5:55am
	Hello, i have a Taichi X399 together with an Threadripper 1900X and a quad kit G.Skill Trident ZF4-3200C14Q-64GTZ. Getting more and more familiar with the bios (1.60) settings, i noticed that the cpu core voltage idle stays always at around 1,4V. Under prime95 it drops at around 1,25V. So i changed the settings in the bios - cpu voltage at 1,325V und a LLC of level 3. Read out with HWINFO64 the results are the same, 1,4V idle and 1,25V under load. And the values are changing / fluctuating constantly, idle from 1,313 to 1,42, under load from 1,19V to 1,29V. With LLC 2 the same, with cpu voltage under 1,3V the same. Is this a normal behavior? It seems that my manual settings in the bios have no effect. Everything else works fine without any errors. Thanks Marcus Edited by OceanBlue72 - 23 Sep 2017 at 5:58am

wardog Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447	Post Options Post Reply Quote wardog Report Post Thanks(0) Quote Reply Posted: 23 Sep 2017 at 6:49am
	Hmmmmm, I don't have one, yet, but ..... Have you enabled Overclock Mode to Manual? Also, what is Voltage Mode set to?

OceanBlue72 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Jan 2016 Location: Munich Status: Offline Points: 58	Post Options Post Reply Quote OceanBlue72 Report Post Thanks(0) Quote Reply Posted: 23 Sep 2017 at 2:34pm
	These are my actual settings: Overclock mode = manual with 100MHz CPU Freq and Voltage = 3800MHz and 1.3V Voltage Mode = Stable Mode CPU Vcore Voltage = Auto CPU LLC = Level 3 VDDCR_SOC LLC = Level 3 Have i missed a necessary setting?

J Z Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 09 Sep 2016 Location: Germany Status: Offline Points: 961	Post Options Post Reply Quote J Z Report Post Thanks(1) Quote Reply Posted: 23 Sep 2017 at 3:02pm
	Hi, Overclock mode = Auto Pstate0 FID = 98 (3800 MHz) Offset Voltage = +0.xxxx ??? Voltage Mode = Stable Mode CPU LLC = Level 5 VDDCR_SOC LLC = Level 5 See Video, Time = 6:15
	Kind Regards, JZ https://shop.JZelectronic.de - Der Shop mit ausgesuchter ASRock Profi Hardware https://www.facebook.com/asrock.de

OceanBlue72 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Jan 2016 Location: Munich Status: Offline Points: 58	Post Options Post Reply Quote OceanBlue72 Report Post Thanks(0) Quote Reply Posted: 23 Sep 2017 at 4:16pm
	Thanks! I set everything to auto except your settings. Pstate0 FID = 98 (3800 MHz) Voltage (uV) = 1300000 Pstate0 VID = 28 Offset Voltage = 0.00625 But this doesn't change the voltage on idle, it is constantly over 1,4v.

OceanBlue72 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Jan 2016 Location: Munich Status: Offline Points: 58	Post Options Post Reply Quote OceanBlue72 Report Post Thanks(0) Quote Reply Posted: 23 Sep 2017 at 5:25pm
	I tried the OC Mode OC 1 in the zen common options and with this the cpu voltage was about 1,36V. But i don't want to overclock, just an idle voltage under 1,4V. So i set custom pstate0 to FID 98 3800MHz and VID 2a 1287500uV. But again - idle voltage over 1,4V.

OceanBlue72 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Jan 2016 Location: Munich Status: Offline Points: 58	Post Options Post Reply Quote OceanBlue72 Report Post Thanks(0) Quote Reply Posted: 23 Sep 2017 at 11:06pm
	Next attempt was setting a fixed voltage instead of offset. With this the values in HWInfo VCore and CPU Core voltage SVI2 TFN were correct (under 1,3V), but all Core VID entries showing me 1,55V? Edited by OceanBlue72 - 23 Sep 2017 at 11:08pm

OceanBlue72 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Jan 2016 Location: Munich Status: Offline Points: 58	Post Options Post Reply Quote OceanBlue72 Report Post Thanks(0) Quote Reply Posted: 24 Sep 2017 at 5:48pm
	Update: I have played a little bit more with the settings. Everything to auto except: Pstate0 FID = a0 (4000 MHz) Voltage (uV) = 1125000 Pstate0 VID = 44 Offset Voltage = 0.17500 Now i have a Core VID at 1,125V and Vcore at 1,296V Under prime95 the Core VID drops at 1,1V. I did the same with Pstate0 FID 9c (3900 MHz) with the same results. Running prime95 for an hour, no errors, temps ok. I don't know it exactly, but i think the right combination of pstae0 VID and Offset is the trick?