I made some other research to see windows 10 support in kvm and I found this tut (by far the best I've ever seen): http://www.se7ensins.com/forums/threads/how-to-setup-a-gaming-virtual-machine-with-gpu-passthrough-qemu-kvm-libvirt-and-vfio.1371980/

Followed it and Windows 10 is working perfectly (even better than my WIndows 7 VM was).

New screens (don't mind the graphical glitches, they are due to bad upload): http://imgur.com/a/ODse2

Looks nice, congrats :)

Awesome, I should take a look at that this weekend.
(I might finally be able to get this thing going, I've been planning, experimenting, and putting it off for about a year now.)

If you need some help, feel free to pm me ^^

saw this thread and thought i'd add a mistake i made for others to learn from:

do not buy two identical cards and expect current kvm to be able to passthrough just one of them; kvm does so by isolating according to vendor:product id and these are the same for identical cards.

xen can apparently isolate one of two identical cards but since xen won't do dom0 with proprietary nvidia drivers i never got to try xen - perhaps with amd?

it's been suggested to me that i edit the video bios of one of my cards to alter the vendor:product id but i don't know what effect that would have on drivers etc. even assuming it could be done.

so now i'm dual booting with two quite expensive cards in sli rather than having one for each os :(

diziet