W880D4U Windows only displaying on iGPU
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=113482
Printed Date: 25 May 2026 at 8:56am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: W880D4U Windows only displaying on iGPU
Posted By: sine_x
Subject: W880D4U Windows only displaying on iGPU
Date Posted: 31 Mar 2026 at 4:27am
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Hello everyone, I have a new W880D4U and I?™m having issues with a PCIe GPU Intel B50. When starting up, the image is output through the GPU and I can work in the BIOS, etc., but once the operating system (Windows 11) begins to load, the display stops updating on the monitor. If I connect the monitor to the iGPU, I can see that in the operating system, the GPU is missing in Device Manager. What could this be related to? BIOS: 2.01 (also tried 1.14) Resize BAR: Enabled Above 4G: option not found in BIOS. |
Replies:
Posted By: Xaltar
Date Posted: 31 Mar 2026 at 1:08pm
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Make sure you have installed the latest drivers for your GPU. From what I can tell looking at your board's manual and specs it would appear Resizable Bar is only available when 64-bit PCIe Decoding is enabled (another name for above 4g decoding). I suspect it is enabled by default on your board. To troubleshoot: Make sure you have disabled CSM Disable the iGPU and Intel Onboard Graphics Set primary display to PCIe Then try to boot into Windows. The only available display adapter in this case should be the B50 dedicated GPU, this may force windows to use it and allow you to install drivers. Good luck. ------------- 
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Posted By: sine_x
Date Posted: 31 Mar 2026 at 8:28pm
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Hello, I don?™t have the 64-bit PCIe Decoding and CSM options in my BIOS, but the system is definitely booting in UEFI mode. I still can?™t see the GPU in the Windows Device Manager. There is only ASPEED Graphics Family and Intel(R) Graphics (iGPU). |
Posted By: Xaltar
Date Posted: 31 Mar 2026 at 10:38pm
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Did you try disabling the iGPU and ASPEED GPU in the BIOS? The options should be under Advanced -> Chipset Configuration. You should also set "Primary Graphics Adapter" to PCIe. Failing that, I am shooting in the dark here, I have never used any of ASRock's server/workstation boards (ASRock Rack). You can try opening a support ticket: https://event.asrockrack.com/tsd.asp" rel="nofollow - https://event.asrockrack.com/tsd.asp Server boards are built to a different standard for specific server workloads so they quite often have major differences in their BIOS vs consumer class boards. -------------
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Posted By: sine_x
Date Posted: 31 Mar 2026 at 11:03pm
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I have filled out the support form for server motherboards. Thank you. Regards, |
Posted By: Xaltar
Date Posted: 01 Apr 2026 at 12:47am
Good luck, let me know how it goes  -------------
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Posted By: sine_x
Date Posted: 02 Apr 2026 at 10:08pm
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Hi, I was able to resolve my issue. To do this, I had to temporarily disable the Intel Platform Trust Technology (PTT) option. After disabling this option in the BIOS, I booted into Windows 11, the GPU appeared in Device Manager, I installed the drivers, rebooted, re-enabled the option, and the card remained visible to the operating system. |
Posted By: Xaltar
Date Posted: 03 Apr 2026 at 12:10am
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That is great news. Thanks for sharing your solution, hopefully it helps anyone else having his issue Enjoy  -------------
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