https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 05 Mar 2026 19:57:43 +0000 Fri, 28 Nov 2025 06:06:47 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=55648 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=55648&PID=200490&title=how-to-get-access-to-advanced-pcie-bios-settingspound#200490 Author: Magnets
Subject: 55648
Posted: 28 Nov 2025 at 6:06am

Did you have any luck with support? I have a b760 pro RS ddr5 with 12400f (h0 stepping) and can't get entire system idle below 35W]]> Fri, 28 Nov 2025 06:06:47 +0000 https://forum.asrock.com/forum_posts.asp?TID=55648&PID=200490&title=how-to-get-access-to-advanced-pcie-bios-settingspound#200490 https://forum.asrock.com/forum_posts.asp?TID=55648&PID=139655&title=how-to-get-access-to-advanced-pcie-bios-settingspound#139655 Author: firstdib
Subject: 55648
Posted: 20 Aug 2024 at 10:45pm

I am currently running the latest bios version, but the setting is sadly not available. I have messaged support, awaiting their reply.]]> Tue, 20 Aug 2024 22:45:59 +0000 https://forum.asrock.com/forum_posts.asp?TID=55648&PID=139655&title=how-to-get-access-to-advanced-pcie-bios-settingspound#139655 https://forum.asrock.com/forum_posts.asp?TID=55648&PID=139161&title=how-to-get-access-to-advanced-pcie-bios-settingspound#139161 Author: firstdib
Subject: 55648
Posted: 20 Aug 2024 at 4:30am

Seems someone over at MSI had the same issue, unsure if they had it resolved though. Link: https://forum-en.msi.com/index.php?threads/using-x16-pcie-slot-preventing-lower-package-c-states.398010/]]> Tue, 20 Aug 2024 04:30:21 +0000 https://forum.asrock.com/forum_posts.asp?TID=55648&PID=139161&title=how-to-get-access-to-advanced-pcie-bios-settingspound#139161 https://forum.asrock.com/forum_posts.asp?TID=55648&PID=138895&title=how-to-get-access-to-advanced-pcie-bios-settingspound#138895 Author: firstdib
Subject: 55648
Posted: 19 Aug 2024 at 2:54am

Hi all,

I have been on a long quest to reduce the power consumption of my systems, and have dove into multiple rabbit holes.

Long story short, my issue seems to be with ASPM and PCI-E lanes.

I have an ASRock B760 Pro RS/D4 where I have connected a NVME drive (chipset) and a LSI HBA on the PCI-E x16 (top one, CPU).

This has had the effect of the system not being able to enter higher C-states, namely anything above C2/C3. I thought this could be an issue with ASPM, but every device supports and has ASPM enabled. The settings are also enabled in the bios.

After some googling I found this thread: https://community.intel.com/t5/Embedded-Connectivity/Using-x16-pcie-slot-disables-low-package-c-states-ASPM-Alderlake/td-p/1555031

This seems to be the exact same issue I have, where the solution is:
> In your BIOS:
>
> Advanced -> Admin -> Chipset->System Agent(SA) configuration->PCI Express Configuration
>
> Set Multi-VC to Disabled on both of PCIE Root Port 1 & PCIE Root Port 2."
>
>
> Setting Multi-VC to Disabled could help reaching C10, meanwhile, by being enabled, the system can only reach C3.

However, this option is not exposed in the BIOS.

Is there any way to expose this option so that my system can finally be more efficient and conserve some of that (expensive) energy :)?

Thanks in advance!]]> Mon, 19 Aug 2024 02:54:52 +0000 https://forum.asrock.com/forum_posts.asp?TID=55648&PID=138895&title=how-to-get-access-to-advanced-pcie-bios-settingspound#138895