Im having what could be a very stupid problem but it is frustrating non the less.
I installed vista x64 on my machine, and an nvidia GeForce 9500 video card, after installing the decklink card and installing the drivers and everything going fine, I cannot choose Decklink HD Extreme card as an output on the display settings windows.
does any one know why it inst listed on the drop down box on the display settings window ? Also Under Display Adapters on the computer Management window I onlty see the GeForce 9500 GT, I dont know if the decklink is supposed to be listed there.
That option is only available on Windows XP. Your card is working fine and will output video properly when using e.g an editing application like Premiere. The extended desktop feature is not available on Windows Vista.