Just to provide an update that others may find useful. I could not make GPU passthrough into ubuntu 18.04 for Nvidia GT520, GT740 and ATI HD5770 cards. All the cards hanged unraid. I was able to make to passthrough GT740 (EVGA, using exactly the same bios file as in ubuntu case) into Win10 half-successfully: VM starts successfully, Windows identifies and uses the video card through HDMI, I can restart the VM as many times as needed. The only issue I have is that HDMI audio does not work. Would appreciate if someone saw this issue: In VM config in unraid it sees the audio controller as NVIDIA GK107 HDMI Audio Controller. When in Windows, in NVIDIA control panel, It sees my receiver (Pioneer) connected to HDMI but has no HDMI Audio device in device manager and no devices in the playback devices in sound config. My motherboard in X11-ssm-f if it helps. I tried to reinstall drivers, switching on tv, reciever and PC is different order -- no difference. Video works 100%. HDMI audio does not. Halp!