I have a GTX 770 passed through to a Windows 10 VM that causes the VM to perform worse than no GPU. It makes the VM behave like the refresh rate is about 10-15 fps. I have tried both OVMF and SeaBIOS. I am using the ACS override because there is a storage controller in the same IOMMU group as the GPU if I don't use the override. I have tried with Hyper-V on and off. Nothing seems to make a difference. The performance degradation is present from the moment the GPU is passed through, even before drivers are installed. What could be causing this? Thanks!