I had a similar setup about a year back. Running a Ubuntu Host with KVM, passing through an NVIDIA 970 to a Windows host. Yea...the GPU performance was fast, b

I had a similar setup about a year back. Running a Ubuntu Host with KVM, passing through an NVIDIA 970 to a Windows host. Yea...the GPU performance was fast, but everything else was so slow compared to running native. I think my biggest issue was with disk R/W, especially when memory pressure went up from the VM the system bogged down to a halt. After that, my biggest problems were with the fact that after the Windows host turned off, the GPU was stuck in the weird state where you can't reset it ( I know its a feature™ from Nvidia) and the Keyboard / Mouse would flake since I would attach the whole USB root to the VM as well. In the end just decided to install back Windows and not have to deal with it.