I did a fresh install due to drive failure. I unplugged all drives except new c: drive and dvd and NVidia gts 450 1gb. I loaded win 7 x64 ultimate and screen looses display after bios and press key to load dvd. I then tried loading same os using ati radeon hd 6450 1gb. This gave me a screen on my monitor but not dual hdmi to lcd and monitor. I upgraded to win 8 having to use the ati drive and I can only get 1 display at a time. I can't get the NVidia card to work at all with either os now. any suggestions?