AMD and Intel Graphics Cards - Unable to change PCIe gen settings

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Unable to change PCIe gen settings

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD and Intel Graphics Cards
Forum Description: Question about ASRock AMD and Intel Graphics Cards
URL: https://forum.asrock.com/forum_posts.asp?TID=17722
Printed Date: 31 Oct 2025 at 12:54pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Unable to change PCIe gen settings

Posted By: Duckster
Subject: Unable to change PCIe gen settings
Date Posted: 05 Jan 2021 at 9:23am

[Motherboard : ASRock B550 Phantom Gaming 4]
[GPU: AMD Radeon 5600xt]

Hello! I am currently having an issue with certain games where when they are opened up and go to full screen, it seems as if my monitor can not find an input (even though my graphics card is plugged in). I contacted some people to see if they had a similar issue or a fix for it and people were saying to change my PCIe from gen 4 to gen 3, the problem would be fixed but there is no setting for me to change it between gens only the amount of lanes [?] (x16 to x8x8).

Replies:

Posted By: ASRock_TSD
Date Posted: 05 Jan 2021 at 12:02pm

Dear Duckster,

Thank you for choosing ASRock.
Regarding your case, which CPU are you using?
If Matisse CPU is installed, the PCIe speed can be adjusted at AMD PBS page.
If Renoir CPU is installed, the default PCIe speed is at Gen 3.

We also provide some suggestion to try.
1. Download and install the latest AMD graphics driver from AMD site.
2. Install the graphics card to PCIE3 to test.

Thank you!
Yours truly,
ASRock TSD