I spent probably in total 20-25 hours trying to get this working for my part, I was up till 8am this morning and I got a breakthrough: my 2nd monitor gave display!
MB: Asus P8Z68-V
GPU (Host): NVIDIA GeForce GTX 570 (ASUS)
GPU (Guest): NVIDIA GeForce GTX 960 (ASUS Strix series)
Host OS: Debian GNU/Linux (Devuan/without systemd!)
Guest OS: Windows... 10.
My initial issue were I didn't get the 960 card to give any output at all. I could load up the Guest system with a virtualized display (inside these fancy dialog boxes, you know), and I could see the 960 there, with drivers installed and everything.
I was on overtime of giving up this project, and I just tried to use UEFI (OVMF) in qemu, just for the hell of it, and by my huge surprise I got the monitor to turn on.
Now the other issue I had was the ISO files for Windows 7 I got from work (yes, legitimate, etc) didn't boot up under the qemu UEFI, so I had to, by my disgust, install Windows 10.
The reason for me creating this thread is a hope of anyone willing to share ways to optimize such a setup. I experience things that could be ironed out, like fix shitty sound, ways to increase FPS in games, etc.
I'm far from an expert in working with hypervisors, but I've done simple tasks with it, nothing fancy. Anyone can set up a virtual machine, right?
Finally, if this thread get at least some attention I could share how I got mine set up, but to get to that I need to gather my
shi setup and see what I really did.