AMD Motherboards - Default PCIe 3.0 Riser Cable Support

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Default PCIe 3.0 Riser Cable Support

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=19373
Printed Date: 08 Aug 2025 at 9:57am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Default PCIe 3.0 Riser Cable Support

Posted By: User8192
Subject: Default PCIe 3.0 Riser Cable Support
Date Posted: 07 Aug 2021 at 5:22pm

Dear User/Support,

I am planning to buy an ASRock B550M-ITX/ac ITX-Board.

The situation I am facing is that I want to build in a case which has a PCIe 3.0 Riser Cable included and I want to connect a PCIe 4.0 GPU.

I heard that I most likely do not get any image output when I connect a PCIe 4.0 GPU with a PCIe 3.0 Riser cable to a PCIe 4.0 Board (B550M-ITX/ac) and I do not want to pre-built externally to switch BIOS Settings to 3.0 first.

My question is now: Has anyone built with this board in this configuration and can tell me if it works out of the box (maybe the board has some PCIe Auto-Detection?), or if the BIOS-Setting of this board is on PCIe 3.0 by default?

Looking forward to any hints.