AB350 Pro4 - Bifurcation
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=18648
Printed Date: 08 Nov 2025 at 4:45pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: AB350 Pro4 - Bifurcation
Posted By: erasor2010
Subject: AB350 Pro4 - Bifurcation
Date Posted: 18 Apr 2021 at 10:27pm
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Hi, i try to setup PCIe Bifurcation on my AB350 Pro4 Motherboard. I have an Supermicro RSC-R2UT-2E8R in the x16 Slot and set it to x8x8 in Advanced ->AMD PBS In the Supermicro Riser are 2 M.2 in PCIe Adapter. BIOS is only Detecting one Card when Set to x8x8, when Set to x16 with one Card installed the Card gets detected, no matter what riser slot i use Here some Images showing my Setup https://ibb.co/r6T06bq" rel="nofollow">  https://ibb.co/PcJFdH2" rel="nofollow"> 
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Replies:
Posted By: ket
Date Posted: 22 Apr 2021 at 11:13pm
| Are you using the latest UEFI for your board? Sounds like this might be a bug you need to contact asrock support about. |