Ryzen 3000 & Navi Megathread | Level One Techs

MisteryAngel · February 6, 2020, 5:03am

I don´t think that this would be an Asus specific issue.

But yeah…

FurryJackman · February 6, 2020, 5:04am

Apparently Asrock also removed the feature:

The latest firmware for X370 Taichi, v5.50 (2019/4/24), removes the “Power Supply Idle Control” option off the configuration UI

MisteryAngel · February 6, 2020, 5:11am

Well you could try to email Asrock and or Asus,
what their reason is for deleting the feature.
Maybe they could give you a plausible explenation.
Likely not, but who knows…?

FurryJackman · February 6, 2020, 6:33am

I was able to use the Global C-States option to disable C-states and still maintain Precision Boost. Turns out I goofed and turned on Custom Pstates in panicked menu switching.

fallenguru · February 6, 2020, 1:26pm

FWIW, no issues on Asus Pro WS X570-ACE, BIOS 1201. It’s on 24/7, I only reboot when a kernel update falls on a full moon.

FurryJackman · February 7, 2020, 12:29am

Okay, I just found something interesting about Precision Boost but I’ll share it in my own thread because it’s an extensive topic.

Ryzen and disabling C6 C-state, the curse of C6 CPU

Okay, found some interesting things about Precision Boost. Original research, take with a grain of salt. Initially I thought disabling C-states disables Precision Boost entirely. This is not true, but it does not mean Precision Boost isn’t affected. Precision Boost is somewhat tied to C-states and allocates frequency based on how low the C-state on other cores can get. Single core performance has to work harder for more power budget if none of the cores can enter C6 C-state. This results in lower boost clocks. Unfortunately, the 2 less than ideal solutions, globally disabling C-state and using zenstates.py need you to compensate for available power/voltage for boost by raising it to hit the same boost clocks as before. Global C-states being off has the most impact, but has the potential to stabilize Live USB/CDs of most Linux distros. If you run a lot of distros, this is what you should choose. zenstates.py only disables C6, allowing inactive cores to downclock more to provide more “budget” to the single loaded core. Of course, since all cores are loaded in a multi-thread workload, C-states don’t do anything for that workload. It’s still up to AMD to fix C6 issues since Precision Boost relies on it to gain more power budget for higher boost clocks on single core. With the crippled state of C6, you will have to live with lower boost clocks or deal with regular instability.

Automobili3XF · February 10, 2020, 3:25am

Just found out there was an update for my ASRock X370 Professional and WOW, IT SUCKS.
The voltage still fluctuates like before AND i can’t put my voltage at fixed mode, i can try to do it, but the motherboard doesn’t obey.
I also somehow can’t find the core frequency adjust anywhere, it used to be under Advanced>AMD Overclocking or simply at the OC Tweaker tab.
That’s it, i’m rolling it back to 5.80.

noenken · February 13, 2020, 3:30pm

B550A looks really interesting. I would actually prefer that implementation over the ones with the real PCIe4 capable chipset even on higher end boards. That way you’d get a stable, proven base platform with no need for active cooling and could still benefit from PCIe4 for the most important parts.

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