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Taichi BIOS V3.10 Strange Happenings
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Ken429 View Drop Down
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    Posted: 07 Sep 2017 at 5:31pm
Updated the BIOS on my Taichi from 3.0 to 3.1. IBT ran ~160.16 seconds on 3.0 and 163.09 seconds on 3.1. The max core temp increased from 65.5C to 67.5C. Cinebench cpu numbers went from 1718 on 3.0 to 1717 on 3.1 and the OpenGL numbers went from 95.35 on 3.0 to 94.66 on 3.1. I guess the differences could be attributed to needle quiver? But, I have run several passes on different days and get the same results - slightly lower CPU scores and higher CPU temperatures.

However, using Pstates for the 3.9GHz OC under 3.1 the minimum idle Vcore drops to ~0.368V versus the 0.900V in Pstate2. The minimum cpu speed dropped to 1950MHz versus the 2200MHz that is in the Pstate2 settings. That is a step backward from 3.0 where the minimum Vcore and cpu speed were the same as specified in Pstate2.

Also, the max Vcore under load is increased by 0.400V when the "Global C-State Control is set to Disabled. I don't think that happened under BIOS v3.00.

I have to ask what benefit is there to V3.10 versus V3.0 on the Taichi M/B to offset the apparent "broken" Pstate2 settings. Should have left well enough alone?! Wasted several hours - back to V3.00?
X470 Taichi, 3800X (BIOS Defaults), BIOS v3.60, Sandisk Extreme Pro 240GB, 2 crucial MX500 1TB, G.Skill 2X 2X8 3200-14, EVGA 1660Ti SC, EVGA 750 G3, W10 1903
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Xaltar View Drop Down
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From what I have seen, I didn't bother with the update on my Taichi. My thinking is "if it ain't broke". In all likelihood 3.1 is just a few tweaks and further expanded memory compatibility. I have not got an official breakdown or anything but my system is stable at rated speeds on 3.0 do for me at least, 3.1 is tempting fate for no reason. 

I may pull my 3600 RAM kit out of my intel setup and see if 3.1 can manage 3600 stable but short of that I am quite happy with 2933 on my 2800 kit @1.2v Smile
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Ken429 View Drop Down
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I went back to 3.00. I set the Global C-State Control setting to Auto after making the Pstate changes. Much to my surprise the idle voltage dropped to ~0.368V when Idle! I changed the Global C-State Control to Disabled and the minimum Vcore dropped to 0.880V when idle. Close enough to the 0.900V in Pstate2 I guess! However unlike BIOS v3.10 the Vcore under load did not increase by 0.400V. I must have left the Global C-State Control set to Disabled when I was happy with the 3.00 BIOS.

Another thing I noticed when running the AMD Ryzen Master program was the MHz on cores 5,6 and 7 dropped to 1950MHz. Cores 1,2,3,4 and 8 settle down to the 2200MHz specified in the Pstate2 settings. So, I guess V3.10 wasn't quite a screwed up (compared to V3.00) as I originally thought. But one other anomaly With V3.100 was core 8 always ran at 3900MHz when the AMD Ryzen Master program was running.

Also, the Max CPU Tdie as reported by HWiNFOR64 dropped back to 63.5C when running IBT for 10 passes under V3.00 versus the 67.5C when running the same test under V3.10.

Edited by Ken429 - 08 Sep 2017 at 5:32pm
X470 Taichi, 3800X (BIOS Defaults), BIOS v3.60, Sandisk Extreme Pro 240GB, 2 crucial MX500 1TB, G.Skill 2X 2X8 3200-14, EVGA 1660Ti SC, EVGA 750 G3, W10 1903
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datonyb View Drop Down
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to add to confusion my taichi with the latest bios now decides to downvolt itself on idle

even though its set at 1.3v in p states
and all the c6 cool n quiet etc is all disabled

unless theres a bug in cpuz
mine can sit at 3900mhz and drop to 0.480 / 0.608

it should or did with last bios sit pretty much at 1.290 ish all the time
[url=https://valid.x86.fr/jpg250][/url]

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That is by design I am pretty sure. My Intel systems all do that too. I think a lot of people forget that before power saving CPUs would remain at full frequency 24/7 but even then, used less power when not under load. It takes a lot less power to maintain say 4ghz at idle than it does at load so the vcore will lower to further save power depending on the load on the CPU. 

CPUz has also had issues with AM4 vcore readings, when I did my Taichi review I was seeing 2.68v in CPUz. The latest update could just be more compatible with CPUz's monitoring back-end. Regardless, there is never anything wrong with seeing lower voltages unless you are unstable Wink 
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Originally posted by datonyb datonyb wrote:

to add to confusion my taichi with the latest bios now decides to downvolt itself on idle

even though its set at 1.3v in p states
and all the c6 cool n quiet etc is all disabled

unless theres a bug in cpuz
mine can sit at 3900mhz and drop to 0.480 / 0.608

it should or did with last bios sit pretty much at 1.290 ish all the time


I assume your Windows Power Plan is still Ryzen Balanced, and the Minimum Processor State is still at 90%?

There are two C State option settings in my different X370 board's UEFI, another is buried somewhere in the AMD CBS options.
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datonyb View Drop Down
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yeah im not complaining
just something i noticed
upto and including version 3
the cpuz would stay at 1.296-1.306 even at idle (i know the current would not be flowing on idle and obviously the temps would be lower)

but now its dropping on idle to 0.480-0.600ish
its not causing an issue and if i start cinebench or something else it ramps directly back upto 1.296

im pretty sure i switched off any bios based extras for example theres a c6 and a global c6 in different places of bios
and yes windows is the ryzen power plan

i was just forwarding on my observations to the group
on a side not i did have a play with ram again this morning
i can boot upto 3600 cl16 at 2t and 1.4 volts
no cold start testing though yet ( and thats where my ram plays up at anything over stock settings)

im just testing the old NEMESIS of mine which was/is the cl14 timings at the moment
its stable in windows yet to give it the cold boot test (this time ive upped the ram volts to 1.395)
something i didnt want to do before now
[url=https://valid.x86.fr/jpg250][/url]

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Ken429 View Drop Down
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Anybody with a Taichi X370 M/B try the latest BIOS (3.20) just released? Any idea on why it was released just 12 days after 3.10 was released? Did ASRock address some of the new bugs introduced in 3.10? I really don't want to spend a few hours updating the BIOS just to find out I took a few steps backward from 3.00?!
X470 Taichi, 3800X (BIOS Defaults), BIOS v3.60, Sandisk Extreme Pro 240GB, 2 crucial MX500 1TB, G.Skill 2X 2X8 3200-14, EVGA 1660Ti SC, EVGA 750 G3, W10 1903
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Looks like I'm talking to myself again. I'll give 3.20 a try on the next rainy day and see what happens.
X470 Taichi, 3800X (BIOS Defaults), BIOS v3.60, Sandisk Extreme Pro 240GB, 2 crucial MX500 1TB, G.Skill 2X 2X8 3200-14, EVGA 1660Ti SC, EVGA 750 G3, W10 1903
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parsec View Drop Down
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Originally posted by Ken429 Ken429 wrote:

Anybody with a Taichi X370 M/B try the latest BIOS (3.20) just released? Any idea on why it was released just 12 days after 3.10 was released? Did ASRock address some of the new bugs introduced in 3.10? I really don't want to spend a few hours updating the BIOS just to find out I took a few steps backward from 3.00?!


The description for the X370 Taichi UEFI 3.20 sums it up fairly well.

DDR4 memory with a stock/JEDEC speed of 2666, will remain at 2666 instead of being down-clocked to 2400.

Ryzen and now some new Intel processors have a maximum memory speed spec (NOT an OC) of 2666/2667. At least one memory manufacture is now producing DDR4 memory whose stock JEDEC (NOT XMP) speed is 2666. Prior to this for Ryzen, 2400 was considered the highest stock/JEDEC memory speed, for example the G.SKILL FlareX 3200 memory has a stock/JEDEC speed of 2400. Most of the earlier DDR4 memory designed for Intel has a stock/JEDEC speed of 2133.

So it's a simple change that most likely won't affect you, so no need to update.

What new bugs are in 3.10?

It takes you a few hours to update the UEFI/BIOS? I assume that means restoring your non-default settings?

EDIT: The drop in VCore below 0.400V with Cool n Quiet and C6 enabled, has been in my X370 Killer SLI/ac board's UEFI for as long as I can remember. Why does that surprise you? My Ryzen PC is perfectly stable when that happens. Also, the core speeds at 2200MHz and ~1950MHz at idle are also standard for my board with the CPU power saving options enabled, and the Windows Power Plan Minimum Processor state adjusted from the Ryzen Balanced 90%.




Edited by parsec - 15 Sep 2017 at 10:25pm
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