AB350 Pro4 - Bifurcation

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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

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erasor2010 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 Apr 2021 Status: Offline Points: 20	Post Options Post Reply Quote erasor2010 Report Post Thanks(0) Quote Reply Topic: AB350 Pro4 - Bifurcation Posted: 18 Apr 2021 at 10:27pm
	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

ket Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 Jul 2017 Location: UK Status: Offline Points: 1676	Post Options Post Reply Quote ket Report Post Thanks(0) Quote Reply 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.