I just bought 3570k CPU and MSI Z77 MPower MBO. First I tried integrated graphics and everything worked fine. Then I put MSI 7870 HAWK and installed latest drivers. After PC has rebooted and entered windows drivers crashed and image on the screen froze. Same thing happened when I put MSI GTX 570 and tried to install nVidia drivers. After I uninstalled all drivers (Intel, AMD, nVidia), discrete cards were running fine with their drivers. So in conclusion, when Intel drivers are installed I can't run any discrete card. This is important to me when I want to quickly switch between discrete and integrated cards without having to uninstall drivers.