How to access 2 added DisplayPorts in Z90Q7P unit with quad display feature?

I have a Z90Q7P unit with the added video card offering 2 additional DisplayPorts.  I can get the mainboard DVI and DP ports to display video, but can't figure out how to access the two ports on the added video card.  The video management utility appears to recognize the presence of the card, but doesn't afford any selection of it for display.  In the BIOS there is the option which should allow selection of the onboard vs add-on video support, but it is greyed out and no selection can be made.

Anyone know what I've overlooked or am missing?

thanks,
Mike