I'm looking at building a new Ryzen based unraid setup, and from what I have been reading when using Nvidia cards you must use one of the cards for the host.  Could I use a https://www.amazon.com/ZOTAC-GeForce-Profile-Graphic-ZT-71304-20L/dp/B01E9Z2D60 as a sacrifcial card in a pci-x1 slot and then use my 2 PCIe x16 slots for video cards(each at 8x) and use my 3rd PCIe x16(v2)@ which is really at 4x for a disk controller?  My assumption is the PCIe x1 and x4 slots are shared resources, however if the video card isn't doing anything other then sitting there it really shouldn't be using much bandwidth.

I'm looking at using this motherboard 

https://www.asus.com/us/Motherboards/PRIME-X370-PRO/specifications/

Any comments?

You can pass through the nivida cards if you follow the guide to download and then supply the nivida rom within the vm's xml file.

 

Also your first x16 will most likely be the primary gpu slot, I'd be surprised if you could assign primary gpu to a x1 slot.

 

Anyway, Passing through your Primary GPU on Ryzen works if you follow the guides already on the forum. So what you see as an issue, is not actually an issue.

Edited June 29, 20179 yr by Tuftuf

Thanks for the quick response, guess I'll keep reading

 

 

Enjoy the reading!