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Thank you for joining the community. I will be more than happy to assist you,
Could you share with us the brand and model of the adapter that you are using?
What is the model of the GPU?
What is the model of the network card?
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The mini-PCIe connector on the DE3815TYBE NUC board is provided for the addition of a wireless capability. I do not believe that the BIOS has support for a bus mastering device being plugged into this connector and I do not believe that the BIOS has support for utilizing the Video ROM provided by the board that you have plugged in to the remote PCIe connector.
thanks for responding!
The GPU is MSI RX 570 Gaming X 4G
The adapters I'm using are:
mPCIe -> PCIe 1x adapter:
PCIe 1x -> 16x adapter:
The NIC is: