Originally posted by grok
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Linux host and guest should have the best results, for windows guests you don't have too many options. SPICE instead of VNC can provide some accel, but I've heard it's not any/much better than the other hypervisors(I think VMWare might be the best in that case). There is also GPU passthrough, plenty of information on reddits r/VFIO sub. This lets you give direct hardware access to a GPU on the system to the VM, usually you want another GPU like iGPU on the host to see it's display(guests using a GPU directly for display output to connected monitors not a window like you might be used to).
You will find best performance usually with VIRTIO VM hardware choices(network, disk, etc), audio probably ICH9, Windows will need virtio drivers, on any distro with access to AUR this is a nice virtio-win package where you can mount the ISO and install, otherwise Fedora provides files, if using SPICE same deal, windows will need drivers, I've not personally done that myself.
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