I've spent a few weeks getting my X570 AORUS Elite WiFi + 3900X + GTX1070 running to my liking so I thought I would share. These settings are also confirmed working on the AORUS Pro WiFi and AORUS Ultra. It will probably be similar for all the X570 AORUS boards. Here are the settings for USB passthrough, single Nvidia GPU passthrough, and more.
Using BIOS F10. This is important as your IOMMU groupings can/will change with AGESA updates.
UEFI / BIOS Settings:
Tweaker
Thanks @Skitals for this post! I was having a tough time configuring my ASUS ROG Strix X570-E for VFIO, and the information you distilled here really helped!
For other Unraid users looking to run this board (which I recommend!), the information that @Skitals put forth is basically the same for the ASUS ROG Strix X570-E. I will note the differences I saw in my experience. Note this data was pulled with MB Bios 1405 (11/26/2019) [AGESA 1.0.0.4 Patch B].
UEFI / BIOS Setti