Add the following to /etc/default/grub
Check for line --- GRUB_CMDLINE_LINUX_DEFAULT="quiet"
Add -- iommu=1 amd_iommu=on (Sub amd to intel depending on CPU)
$ sudo update-grub
Reboot!

Verify IOMMU is enabled
$ dmesg | grep IOMMU

Lets Find the Card to passthrough
$ lspci -nn | grep -iP "VGA|audio"

Setup VFIO with Device numbers/id from above VIDEO AND AUDIO!
$ sudo nano /etc/initramfs-tools/modules
Add the following
softdep amdgpu pre: vfio vfio_pci

vfio
vfio_iommu_type1
vfio_virqfd options vfio_pci ids=1002:67df,1002:aaf0
vfio_pci ids=1002:67df,1002:aaf0
vfio_pci
amdgpu

$ sudo nano /etc/modules
Add the following:
vfio
vfio_iommu_type1
vfio_pci ids=1002:67df,1002:aaf0

$ sudo nano /etc/modprobe.d/amdgpu.conf
softdep amdgpu pre: vfio vfio_pci

$ sudo nano /etc/modprobe.d/vfio_pci.conf
options vfio_pci ids=1002:67df,1002:aaf0

lspci -vnn | grep -iP "vga|amdgpu|nvidia|nouveau|vfio-pci"

Avoid BSODs on New Windows 10 Installs
$ sudo nano /etc/modprobe.d/kvm.conf
options kvm ignore_msrs=1
options kvm report_ignored_msrs=0

Fix Apparmor restrictions
$ sudo nano /etc/apparmor.d/abstractions/libvirt-qemu
--Modify--
# for usb access /dev/bus/usb/** rw,
/etc/udev/udev.conf r,
/sys/bus/ r,
/sys/class/ r,
/run/udev/data/* rw,
--Append--
# Looking Glass
/dev/shm/looking-glass rw,
$ sudo systemctl restart apparmor