1. Prepare the host to Passthrough GPU

https://www.youtube.com/watch?v=IE0ew8WwxLM

1.1 Step 1 - Edit & Update GRUB

$ nano /etc/default/grub

# from 
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
# to 
GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on iommu=pt pcie_acs_override=downstream,multifunction nofb nomodeset video=vesafb:off,efifb:off"

Change the following lines:

Update GRUB

$ update-grub 

1.2 Step 2 - Edit Module Files

$ nano /etc/modules

Add following lines:

vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd

1.3 IOMMU Remapping

$ nano /etc/modprobe.d/iommu_unsafe_interrupts.conf

Add following line:

options vfio_iommu_type1 allow_unsafe_interrupts=1

Then edit the kvm.conf file:

$ nano /etc/modprobe.d/kvm.conf