March 16, 20179 yr Basically the title. The way my iommu groups are laid out this is my only option at this point. I have a 6700k(skylake) and an asus z170-a, and I'm trying to set up two windows vms. For Gpus I have the iGPU (which is decent for what I want to do), a gtx 1060, and a crappy Radeon 4670(I think)(which manages to be far worse than the onboard graphics). Ideally, I would put the Radeon in the top slot, the 1060 in the second x16 slot, and enable the onboard graphics. I would then give the Radeon to unRAID, and pass through the iGPU and 1060 to their respective VMs. I can't do this however, since the two slots that the Radeon and the 1060 are in share an iommu group, as they are run off pcie lanes directly from the CPU. So, I am currently forced to give the iGPU to unRAID, put the Radeon in the bottom slot(which is through the pch and thus has a different iommu group but due to its proximity to my PSU only physically fits a single slot gpu), and pass through the Radeon and 1060 to the windows VMs. This leaves me with crap performance on the VM with the Radeon, thus leaving me to hope that the answer to the question in the title is "yes". ps: sorry about that wall-o-text, I'm on mobile right now and don't have the ability to format properly.
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