More problems, this time with Radeon HD6450 which supposed to work... Windows 7 x64 BSOD's after drivers installation during reboot:
I can successfully pass-through my Startech USB3.0 card so pass-through is working fine for non GPU peripherals.
Before drivers are installed Radeon HD6450 shows up with error 10 i.e. device failed to start etc.
Does anyone have any suggestions?