I have this text in my XML
<video>
<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
If I change vram to 524288, my virtual machine will get 512 MB ? Should I use nvidia proprietary drivers on host if I want to emulate GPU video RAM or nouveau is okay ?