W880D4U Windows only displaying on iGPU

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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.

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sine_x Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 hours 41 minutes ago Location: U.S. Status: Online Points: 30	Post Options Post Reply Quote sine_x Report Post Thanks(0) Quote Reply Topic: W880D4U Windows only displaying on iGPU Posted: 18 hours 13 minutes ago at 4:27am
	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.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Online Points: 35623	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 9 hours 32 minutes ago at 1:08pm
	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.


sine_x Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 hours 41 minutes ago Location: U.S. Status: Online Points: 30	Post Options Post Reply Quote sine_x Report Post Thanks(0) Quote Reply Posted: 2 hours 12 minutes ago at 8:28pm
	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).

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Online Points: 35623	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 2 minutes ago at 10:38pm
	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 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.