ASRock.com Homepage
Forum Home Forum Home > Technical Support > AMD Motherboards
  New Posts New Posts RSS Feed - Dual GPUs on B550M Pro4 - default selection£
  FAQ FAQ  Forum Search Search  Events   Register Register  Login Login

Dual GPUs on B550M Pro4 - default selection£

 Post Reply Post Reply
Author
Message
phofman View Drop Down
Newbie
Newbie


Joined: 07 Dec 2022
Status: Offline
Points: 50
Post Options Post Options   Thanks (0) Thanks(0)   Quote phofman Quote  Post ReplyReply Direct Link To This Post Topic: Dual GPUs on B550M Pro4 - default selection£
    Posted: 07 Dec 2022 at 9:50pm
Hi,

Please is it possible to choose a default GPU to be used by Bios/win10 on boot on B550M Pro4 (Ryzen 9 5900X, no internal GPU)? A faster PCI-e v.4 graphics card would be used for headless rendering in Blender, while a slower PCI-e v.3 one would be for monitor output to avoid long refresh lockups.

Thanks a lot for any hints or help.
Back to Top
SerchTech View Drop Down
Senior Member
Senior Member
Avatar

Joined: 16 Oct 2022
Location: Spain
Status: Offline
Points: 1365
Post Options Post Options   Thanks (0) Thanks(0)   Quote SerchTech Quote  Post ReplyReply Direct Link To This Post Posted: 08 Dec 2022 at 12:43am
Hi

I have no experience with B550M but observing the Pro4 one of your GPUs should be connected to the lower black x16 slot (Chipset) and will be limited at x4 PCIe lanes, seems perfect to connect your monitor.

Blender allow to users chose the GPU for Cycles in System Preferences so it is possible that you can work with your custom Dual-GPUs but I can't confirm it.

It would be great if BIOS or Windows allowed users to choose the main GPU but unfortunately (if I do not miss something) at this time it can not be done.


Good luck

X399 Taichi (4.03)
Threadripper 2950X
DDR4 2 x HX432C16FB3K2/32
Back to Top
phofman View Drop Down
Newbie
Newbie


Joined: 07 Dec 2022
Status: Offline
Points: 50
Post Options Post Options   Thanks (1) Thanks(1)   Quote phofman Quote  Post ReplyReply Direct Link To This Post Posted: 08 Dec 2022 at 2:26am
Originally posted by SerchTech SerchTech wrote:

Hi

I have no experience with B550M but observing the Pro4 one of your GPUs should be connected to the lower black x16 slot (Chipset) and will be limited at x4 PCIe lanes, seems perfect to connect your monitor.


Thanks a lot. I tested with an old GTX1030 in the bottom slot. Windows eventually recognized the second GPU, Blender nicely distributes load between the two GPUs, clearly visible in the GPU performance charts of the windows task panel.

But BIOS does not seem to offer any way to pick the bottom GPU as default, to display POST, booting etc. I will have to leave that for the card in the top PCI-e v4 slot.

Quote
It would be great if BIOS or Windows allowed users to choose the main GPU but unfortunately (if I do not miss something) at this time it can not be done.


E.g. Linux would certainly allow chosing a GPU, maybe even windows, but BIOS is the culprit here. Not seeing a POST + boot loader is not viable.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.04
Copyright ©2001-2021 Web Wiz Ltd.

This page was generated in 0.172 seconds.