I've been trying to get this feature to work for hours now with no success. I'm currently running an i5-2500k, Gigabyte Z68X-UD3H-B3, Radeon HD6870, 8GB G.Skill 1600, Windows 7 x64, 2 HDDs in AHCI mode (not RAID).
I basically can't get into Windows with the Intel HD graphics and GPU enabled simultaneously. I have the IGP option set to always enable and display onboard first with the DVI cable hooked into the motherboard (tried hooking up to GPU but still the same). It will post but then immediately reboots itself when it goes to the loading Windows screen.
I also tried removing the video card completely, which did allow me to install the Intel drivers and Virtu, but as soon as I put the GPU back in, it reboot before Windows could load. It's not possible to install either programs if onboard is not enabled in BIOS.
I updated to the latest beta BIOS for my board, same results.
Has anyone with this board been able to get Virtu to run?