i have a problem. to which i cannot currently find any solution. i would really appreciate your support to rectify said problems

now coming to the problem : - i have a asus hd 7990 reference graphics card which i want to pass through to a windows 10 vm it is a single card with two gpu chips. when i select 1 gpu  (04:00:0) as the primary for the pass through the vm boots properly, but  if i add 2nd graphics card (05:00:0) to the vm the Vm gets stuck at the ipxe screen the last message it gets stuck at says the following:

 

iPXE (http://ipxe.org) 02:01.0 D000 PCI2.10 PnP PMM+7FF90000+7FEF0000 D000

 

Similarlly if i assigns the (05:00:0) graphics card as the primary card i get the error

 

internal error: process exited while connecting to monitor: 2016-12-27T22:29:36.192961Z qemu-system-x86_64: -device vfio-pci,host=05:00.0,id=hostdev0,x-vga=on,bus=pci.2,addr=0x4: vfio: Device does not support requested feature x-vga

2016-12-27T22:29:36.193017Z qemu-system-x86_64: -device vfio-pci,host=05:00.0,id=hostdev0,x-vga=on,bus=pci.2,addr=0x4: Device initialization failed.

 

please help me rectify this problem. i want to have the HD7990 running in crossfire mode inside the VM. i have very little coding knowledge but can follow your instruction to a T. So please do be elaborate when you send a solutions.

 

 

cpu: i7-3970x

ram : dd3 g.skil 64 gb

mb: asus sabertooth x79

primary boot gpu : r7 250

second gpu (pass-through) : asus hd 7990

have you ever made in working?