AMD zen 1 is this build. I'm more concerned with the VM qemu breaking. Bios. Secure vm enabled, sr-iov enabled, amd dps? Memory iommu enabled. this is bios setting on board firmware to allow PCIE device pass thought.   While this is off-topic as Unriad has pretty much perfected Iommu settings... ( i run many devices with pcie pass though with unraid.) off topic: Grub Config https://wiki.ubuntu.com/Kernel/KernelBootParameters https://manpages.ubuntu.com/manpages/bionic/man7/kernel-