> AMD lets you pass your graphics cards through to your VMs, no problem.
This is still based on a 1-1 basis i.e. one GPU passthrough-ed for one VM. Intel's GVT-g, notably XenGT, is IMO more interesting: allowing for one iGPU to be shared with up to 4 VMs (DomU + 3 DomU). This is especially interesting considering Intel's recent inroads into the GPU market with Iris Pro graphics, even bundling them with certain Xeon CPUs.
The XEON CPU's which come with IGP's are the low end CPU's (E3 only) which are re-branded low to mid range desktop processors that were cherry picked to go through XEON's QC process.
Intel doesn't ship high end desktop or server CPU's with IGP's atm, the decision for the XEON's was to provide video transcoding performance, even highest performance Iris chip is still no match for even a mid range GPU from 5 years ago.
This is still based on a 1-1 basis i.e. one GPU passthrough-ed for one VM. Intel's GVT-g, notably XenGT, is IMO more interesting: allowing for one iGPU to be shared with up to 4 VMs (DomU + 3 DomU). This is especially interesting considering Intel's recent inroads into the GPU market with Iris Pro graphics, even bundling them with certain Xeon CPUs.