https://documentation.suse.com/sles/15-SP1/html/SLES-all/cha-libvirt-config-... For KVM, QEMU, and some other AMD64 virtual machine systems that use QEMU code you have a choice of pc-i440fx-5.0 (default) and pc-q35-5.0 for the machine type. The command "kvm -L help" gives you a list of machine types. The above URL is the only one I could find mentioning the difference, it says that "q35 is an Intel* chipset and includes PCIe, supports up to 12 USB ports, and has support for SATA and IOMMU". https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-virt... I have the virtual IO drivers for storage (included in Linux by default and available for Windows at the above URL). I use the curses terminal for Linux VMs and am experimenting with VNC for Windows VMs so don't need USB keyboard and mouse. I don't need passthrough PCIe and the IOMMU only matters if you are running a hypervisor not for a guest. So would there be any benefit in using q35? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/