I have a desktop machine with a PCI Express slot (2.0 I think) and 16GB of RAM, and when I boot the computer both screens display video. However, when I log into Windows 10 the second display (DVI) disappears. The main screen (HDMI) runs my game, Company of Heroes 2, that I just bought the graphics card for. How do I get the second display up and running? Does this video card not support dual displays? My driver version is Crimson Relive 17.9.1 Should I have bought a different card to support dual displays? My R7 370 video card, which I just replaced with the 550, ran both displays perfectly. The problem was, the R7 370 would not allow me to play COH 2, and so that's why I bought this one. Please help.