Add-in USB Controller and ASRock X370 Taichi motherboard

Does anyone have any experience with an add-in USB controller and the ASRock x370 Taichi board? In particular what IOMMU group it will end up in?

I’m presently having issues with the keyboard and/or mouse causing issues sometimes between the VM host and guest.


I’m interested in the same thing. Did anyone manage to use a passthrough USB card on this board?