Your PSU claims to only be capable of delivering 384W over the 12v rail. The video card you are trying to install is about 300W alone.
Try a higher capacity PSU.
And you did not answer my other question, is the display cable plugged in to this graphics card?
Edit: The VGA/DVI/HDMI cable between the display and the computer should be connected to the card and not the motherboard video outlet.