GPU passthrough problems


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I am new to unraid and vms. I have set up a windows 10 vm, and I am having problems passing through my GPU. Currently I get a black screen and nothing else, when trying to pass through my GTX980ti. I have tried downloading and modifying a vbios from techpowerup as per spaceinvaders instructions. My next step was to dump the vbios myself. I installed an Radeon HD 6850 as the primary GPU and the 980ti as the secondary GPU to attempt to do this. Now unraid doesnt even see the 980ti at all. I am able to passthrough the 6850 with no issues. What do I do now? I can post any logs or any other information necessary, but I dont know what is needed to debug. All help is appreciated!

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