https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sun, 19 Apr 2026 15:19:06 +0000 Mon, 22 Mar 2021 21:03:26 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=18433 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=18433&PID=84820&title=b450-pro4-running-gpu-at-x8-not-x16#84820 Author: muziqaz
Subject: 18433
Posted: 22 Mar 2021 at 9:03pm

X8 is still plenty for the GPU. For reference I run my 6900xt at x8, and see no performance issues.
In order to get x16n working, there is BIOS setting which let's you select PCI-e link speed.

Since Asrock did not bother adding English Manual in their support page, I cannot tell you exactly where that setting is]]> Mon, 22 Mar 2021 21:03:26 +0000 https://forum.asrock.com/forum_posts.asp?TID=18433&PID=84820&title=b450-pro4-running-gpu-at-x8-not-x16#84820 https://forum.asrock.com/forum_posts.asp?TID=18433&PID=84806&title=b450-pro4-running-gpu-at-x8-not-x16#84806 Author: Vulpie05
Subject: 18433
Posted: 22 Mar 2021 at 4:07am

Hi-

I've been running my B450 Pro4 for a few years with no problems. I had a 2200G APU and a 1660 Ti GPU. The GPU would run at x8 PCIe link speed, as advertised, because of the Raven Ridge APU.

The other day I upgraded the 2200G to a 2700, and the PCIe link speed is still at x8. I have cleared CMOS, reinstalled my NVIDIA driver, and ran DDU for the old AMD drivers. Still runs at x8.

What am I missing here£ I don't have any other PCIe slots filled, nor any M.2 drives (I'm using 2 sata drives, though).

Any help would be appreciated, thank you!]]> Mon, 22 Mar 2021 04:07:16 +0000 https://forum.asrock.com/forum_posts.asp?TID=18433&PID=84806&title=b450-pro4-running-gpu-at-x8-not-x16#84806