2nd GPU / riser problem - Windows boot freeze
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=19827
Printed Date: 18 May 2024 at 10:04pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: 2nd GPU / riser problem - Windows boot freeze
Posted By: snq
Subject: 2nd GPU / riser problem - Windows boot freeze
Date Posted: 15 Nov 2021 at 11:03pm
Hi! I'm having a hard time connecting second GPU (2x3080) over the 1x to 16x riser (PCIE3 slot) to my B550m Pro4. After connecting second GPU I can boot to Windows normally, but the 3080 shows as Microsoft Generic Display Adapter. After Windows installs the drivers for the graphics card the system becomes reeeaaaly laggy (few seconds lag) and the device state is "Windows is uninstalling drivers" (code 21 AFAIR). When I connect the riser to PCIE1 - no problemo alles bueno. From what I have read this board is supposed to support dual GPU (8x/8x PCIe config, but still). I'm currently waiting for a PCIe splitter like suggested https://www.reddit.com/r/ASRock/comments/nzgdsw/cannot_add_second_gpu_to_x570_phantom_gaming_4/" rel="nofollow - here .
System: 3080 v1, 3080 v2, 5600x, B550m Pro-4, Seasonic PX-850 W, Windows 10 Pro, 32 GB DDR4
I have already:
- disabled CSM and reinstalled Windows
- changed PCIe GFX lanes from 16x to 8x/8x
- changed PCIe speed from Auto to Gen2 and Gen1
- enabled 4G decoding
- disabled resizable BAR
- try to install drivers with only over-the-riser GPU installed - same result
- creating 32 GB of paging file
Anyone has any luck with such system configuration?
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Replies:
Posted By: snq
Date Posted: 17 Nov 2021 at 2:17am
I have just received the splitter. Connecting GPU through the splitter makes it work.
BIOS settings:
PCIe lanes config 8x8x,
PCIe speed - Auto (not Gen2/1)
4G Decoding Enabled
Resizable Bar Disabled
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Posted By: Deeznutz
Date Posted: 28 Feb 2022 at 12:48pm
Hello, im having the same issues on my b550m motherboard with ryzen 5 5600g
So where did you connect your pcie splitter? To the x16 slot or x1?
Thanks in advance
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