is anybody able to boot this setup successfully? I have a MacPro5,1 with Windows 8.1 installed (EFI boot, NOT BIOS emulation!). this works if there's an ATI Radeon 5770 installed. but a soon as I try to run this with an NVIDIA GeForce GT 120 installed, Windows just resets the system shortly before the login screen appears. it doesn't matter what driver I use (Apple's Boot Camp GT 120 driver or NVIDIA's own 9500 GT driver). any ideas?