https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 20 May 2026 17:22:43 +0000 Thu, 22 Feb 2024 00:20:43 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=25732 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111738&title=b550m-pro4-bifurcation-supportpound#111738 Author: dingyASrock
Subject: 25732
Posted: 22 Feb 2024 at 12:20am

dingyASrock wrote: deleted spammer wrote: It's great that you're exploring the B550M Pro4's bifurcation support! While information may be scarce, checking BIOS settings related to PCIe configuration could be a good start. What kind of bot-like scamming is this?

To respond to your point, whilst removing the embedded scam link in case it was a genuine point by an account created 30 minutes ago.

You can't access the bios during the pre-build phase without the CPU available but otherwise good advice for someone else with a system currently up and running. Cheers.

ps. If this is a legitimate account, checking if your computer is compromised by malware could be a good start.



Edited by Xaltar - 22 Feb 2024 at 6:54am]]> Thu, 22 Feb 2024 00:20:43 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111738&title=b550m-pro4-bifurcation-supportpound#111738 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111737&title=b550m-pro4-bifurcation-supportpound#111737 Author: dingyASrock
Subject: 25732
Posted: 22 Feb 2024 at 12:11am

deleted spammer wrote: It's great that you're exploring the B550M Pro4's bifurcation support! While information may be scarce, checking BIOS settings related to PCIe configuration could be a good start.

What kind of bot-like scamming is this?

Edited by Xaltar - 22 Feb 2024 at 6:54am]]> Thu, 22 Feb 2024 00:11:52 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111737&title=b550m-pro4-bifurcation-supportpound#111737 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111732&title=b550m-pro4-bifurcation-supportpound#111732 Author: dingyASrock
Subject: 25732
Posted: 21 Feb 2024 at 9:04pm

dingyASrock wrote: No problem. I've asked another. The "energy efficient self-build NAS" crowd (probably a small crowd!) will absolutely be interested depending on the answer I get. Regards.

For the affordable home-build NAS crowd looking at options. I think this is solid board for both affordability and feature set.

Below is a series of Q/response from support about my intentions to use it with 5 NVMe, a 10GB NIC and 4 SATA HDD (actually up to 6 SATA possible with increasing bottleneck risk is my takeaway):

The exchange is below. Answers from tech support are bound by quotations:

----

This is what I am trying to achieve with the board and the PCIe lanes I have available. Using a Renoir 4350G and an NVMe adaptor card bifuracted in the x16 slot:

- 4 NVMe drives total available for storage

- 1 NVMe boot (can go down to a SATA SSD on a shared port or something if required)

"5 NVMe SSDs should work fine that way. 3 on the adapter card, and 2 on the motherboard."



- 4 SATA HDD on unshared SATA III ports

"All good."



- 10Gb NIC

"The x16 slot operating at PCIe 3.0 x4 should provide sufficient bandwidth for that."



- If relevant I'll be using 128Gb ECC unbuffered in 32Gb sticks.

"With APUs, ECC functionality is supported only with the PRO versions. Ryzen 3 PRO 4350G is suitable."



If this config is possible, could you note any performance bottle necks due PCIe lane availability that jump out at you regarding the 10Gbs NIC and NVMe.

"PCIE1 and M2_1 are connected directly to the CPU.

The other PCIe slots, M.2 socket and SATA ports are all connected to the chipset.

The chipset is linked to the CPU via PCIe 3.0 x4. If there is a bottleneck, that is where it is.



PCIe 3.0 x4 ??4 GBps

10 Gbit NIC ??1.25 GBps

M2_2 is PCIe 3.0 x2 ??2 GBps

4x SATA is max 4x 600 MBps ??2.4 GBps

Total: 5.65 GBps + USB

So in theory, there can be a bottleneck, on any AM4 board. Most users will not fully saturate all of those lanes simultaneously."

-----

That's it. Nothing more for the thread. Hope this helps someone.

Awesome response time from ASrock tech support via email. Don't assume it will take an age like I always do. Reddit is not always the way!
]]> Wed, 21 Feb 2024 21:04:02 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111732&title=b550m-pro4-bifurcation-supportpound#111732 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111712&title=b550m-pro4-bifurcation-supportpound#111712 Author: dingyASrock
Subject: 25732
Posted: 21 Feb 2024 at 7:46pm

No problem.

I've asked another.

The "energy efficient self-build NAS" crowd (probably a small crowd!) will absolutely be interested depending on the answer I get.

Regards.]]> Wed, 21 Feb 2024 19:46:09 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111712&title=b550m-pro4-bifurcation-supportpound#111712 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111710&title=b550m-pro4-bifurcation-supportpound#111710 Author: Xaltar
Subject: 25732
Posted: 21 Feb 2024 at 7:37pm

Thanks for sharing your response ]]> Wed, 21 Feb 2024 19:37:52 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111710&title=b550m-pro4-bifurcation-supportpound#111710 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111709&title=b550m-pro4-bifurcation-supportpound#111709 Author: dingyASrock
Subject: 25732
Posted: 21 Feb 2024 at 7:22pm

Hi all,

Support response was excellent and rapid.

Here it is copied and pasted.

Bifurcation of the PCIe x16 slot is possible. Maximum bifurcation??


?Świth Renoir/Cezanne:

BIOS > Advanced > AMD PBS > PCIe/GFX Lanes Configuration > x8x4x4


?Świth Vermeer/Matisse:

BIOS > Advanced > AMD PBS > PCIe/GFX Lanes Configuration > x4x4x4x4



So if you want to use to use an adapter like that with Renoir, it should work fine. But only 3 M.2 SSDs can be used. You will have to test to find out which 3 of the 4 M.2 sockets on the card can be used.



You might have to disable CSM as well:

BIOS > Boot > CSM > CSM > Disabled

Thanks.



Kind regards,

Technical Support Department]]> Wed, 21 Feb 2024 19:22:05 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111709&title=b550m-pro4-bifurcation-supportpound#111709 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111708&title=b550m-pro4-bifurcation-supportpound#111708 Author: dingyASrock
Subject: 25732
Posted: 21 Feb 2024 at 6:40pm

dingyASrock wrote: Did you ever get an answer to this question? Looking at 4xNVMe drives running at x4 in the 16 slot but the card requires the motherboard to support the bifurcation. Any help would be really appreciated.

I've already reached out to support, awaiting response but hoping this would shed more light and perhaps more quickly.

Thanks]]> Wed, 21 Feb 2024 18:40:59 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111708&title=b550m-pro4-bifurcation-supportpound#111708 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111707&title=b550m-pro4-bifurcation-supportpound#111707 Author: dingyASrock
Subject: 25732
Posted: 21 Feb 2024 at 6:38pm

Did you ever get an answer to this question?

Looking at 4xNVMe drives running at x4 in the 16 slot but the card requires the motherboard to support the bifurcation.

Any help would be really appreciated.]]> Wed, 21 Feb 2024 18:38:24 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=111707&title=b550m-pro4-bifurcation-supportpound#111707 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=104404&title=b550m-pro4-bifurcation-supportpound#104404 Author: ASRock2p
Subject: 25732
Posted: 07 Apr 2023 at 10:46pm

ASRock2p wrote: threadzipper1957 wrote: Use the support form https://tw.asrock.com/events/tsd.asp And check Your spam folder for replies Thank you ??

fyi The forum presentation logic misinterpreted my windows emoji insertion of thumbs up to ??

]]> Fri, 07 Apr 2023 22:46:23 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=104404&title=b550m-pro4-bifurcation-supportpound#104404 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=104403&title=b550m-pro4-bifurcation-supportpound#104403 Author: ASRock2p
Subject: 25732
Posted: 07 Apr 2023 at 10:44pm

threadzipper1957 wrote: Use the support form https://tw.asrock.com/events/tsd.asp And check Your spam folder for replies

Thank you ??]]> Fri, 07 Apr 2023 22:44:31 +0000 https://forum.asrock.com/forum_posts.asp?TID=25732&PID=104403&title=b550m-pro4-bifurcation-supportpound#104403