https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 10 Jun 2026 04:39:40 +0000 Fri, 24 Oct 2025 13:35:14 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=86359 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=86359&PID=199264&title=z890-pacakge-cstates-deeper-than-c2pound#199264 Author: LoisX
Subject: 86359
Posted: 24 Oct 2025 at 1:35pm

Hello!

I am troubleshooting identical pkg c2 state issues on another intel 200s mainboard.

Would you be so kind and post the results after the bios fix?

Not sure which operating system you are now running:

On Windows using throttlestop (extended package cstate window)

On linux maybe the kernel version you are using and the output of powertop and also turbostat -S ?

Thanks in advance!]]> Fri, 24 Oct 2025 13:35:14 +0000 https://forum.asrock.com/forum_posts.asp?TID=86359&PID=199264&title=z890-pacakge-cstates-deeper-than-c2pound#199264 https://forum.asrock.com/forum_posts.asp?TID=86359&PID=172928&title=z890-pacakge-cstates-deeper-than-c2pound#172928 Author: Yump
Subject: 86359
Posted: 03 Jan 2025 at 2:49pm

Update: It's fixed as of BIOS 2.22.AS05. With all of the PCIE ASPM settings and SATA ALPM enabled, the windows "power saver" power plan can reach package C8, for only 20 W from the wall on this ancient 80+ bronze PSU.

Thanks, ASRock BIOS team!

In Linux I'm still stuck at C2, but enabling the "SAGV" memory setting in BIOS gets it almost as low as Windows, with the typical TLP tweaks. Use your XMP speed for point 4, and 2000, 3600, 4000 for points 1-3, all in gear 2. These values are from the Intel 12th Gen datasheet.]]> Fri, 03 Jan 2025 14:49:58 +0000 https://forum.asrock.com/forum_posts.asp?TID=86359&PID=172928&title=z890-pacakge-cstates-deeper-than-c2pound#172928 https://forum.asrock.com/forum_posts.asp?TID=86359&PID=170340&title=z890-pacakge-cstates-deeper-than-c2pound#170340 Author: Yump
Subject: 86359
Posted: 23 Dec 2024 at 11:08am

The below was copied from the support request form, 30 minutes after the expected automated email failed to arrive:

Hardware:

Board: ASRock Z890 Pro-A Wifi
CPU: Intel Core Ultra 7 265K
RAM: Crucial cp2k24g60c48u5 2x24 6000C48 @1.1V
Disk: 120 GB Inland Professional SSD
PSU: Antec Neo Eco 620C PSU

What BIOS option(s) do I need to set to allow the CPU to enter deep idle?

Turbostat reports that package sleep states deeper than the shallowest C2 are never used, and also, "MSR_PKG_CST_CONFIG_CONTROL: 0x00008002 (locked, pkg-cstate-limit=2 (pc3))", which is certainly suggestive. As far as I can tell, this platform is supposed to support also C3, C6, C8, and C10.

I've tried a bunch of different options that seem power-saving-related: all the ASPM and ALPM BIOS option set to least-power, "power floor management" in the CPU OC options set to Disabled, and nothing plugged in but a single SATA SSD. Nothing I can find changes that limit or results in any package c-state residency below C2.

The only thing that moves the wall power at all from 29 W is System Agent Geyserville, but that also underclocked the RAM to 5600, and it only shaves 3W. I understand that older, non-resonant-LLC PSUs can be less efficient at low load, but the package power is also 8 W (higher than my old Haswell) and the chipset heatsink stays noticeably warm.

I even tried Windows, which is actually a little worse, at 30 W from the wall.

Please help. I have seen posts on Reddit and AskUbuntu from people having similar problems with older chipsets, using an AMISCE Windows utility to change unexposed BIOS settings. But, I don't want to risk a bricking, and even if that worked I wouldn't want to have to do it again every time there's a BIOS update.

My preferred outcome is that the setting that people are modding with AMISCE become available in the public BIOS release, so that less "enthusiastic" owners can benefit. I've spent way more time chasing this down than the electricity would cost already, and I'd like the result to be multiplied.]]> Mon, 23 Dec 2024 11:08:54 +0000 https://forum.asrock.com/forum_posts.asp?TID=86359&PID=170340&title=z890-pacakge-cstates-deeper-than-c2pound#170340