Question regarding PCIe bifurcation on B850M SLW

I'd like to confirm if the B850M SLW (https://www.asrock.com/mb/AMD/B850M%20Steel%20Legend%20WiFi/index.us.asp#Overview) can have it's PCIe x16 slot bifurcated to x4x4x4x4 in order to allow bifurcation required type adapters (like https://www.amazon.com/GLOTRENDS-PU41-Bifurcation-Function-Motherboard/dp/B0D3XX7PSF) to work without a PCIe switch. I would be using a Ryzen 9700x CPU.

Manual here: https://download.asrock.com/Manual/B850M%20Steel%20Legend%20WiFi.pdf

Sadly, "bifurcation" and "x4x4x4x4" do not show up in a text search.
However there is a section:
>RAID ??Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices
> ??Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices*
>* Requires additional M.2 NVMe expansion cards to support RAID 10

That indicates it may exist, but has just been poorly named.

(Note to asrock marketing if you see this, mentioning "bifurcation" and "x4x4x4x4" is a good idea if those are supported. IF they are not supported, explicitly saying so is a good idea to remove doubt)

sr5ttyhrsyha wrote: I'd like to confirm if the B850M SLW (https://www.asrock.com/mb/AMD/B850M%20Steel%20Legend%20WiFi/index.us.asp#Overview) can have it's PCIe x16 slot bifurcated to x4x4x4x4 in order to allow bifurcation required type adapters (like https://www.amazon.com/GLOTRENDS-PU41-Bifurcation-Function-Motherboard/dp/B0D3XX7PSF) to work without a PCIe switch. I would be using a Ryzen 9700x CPU. Manual here: https://download.asrock.com/Manual/B850M%20Steel%20Legend%20WiFi.pdf Sadly, "bifurcation" and "x4x4x4x4" do not show up in a text search. However there is a section: >RAID ??Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices > ??Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices* >* Requires additional M.2 NVMe expansion cards to support RAID 10 That indicates it may exist, but has just been poorly named. (Note to asrock marketing if you see this, mentioning "bifurcation" and "x4x4x4x4" is a good idea if those are supported. IF they are not supported, explicitly saying so is a good idea to remove doubt)

i tested mine b650m-hdv/m.2 - (8x/4x/4x) bifurcation of a main slot - A2000 GPU and 2x nvme, it works fine.

i think i can connect 6x nvme and gpu at pcie 8x to this board



Edited by M440 - 8 minutes ago at 1:18am