I have just tried to build my first pc but i have come up with a problem when i turned it on i get the message "you have not connected one of your video card power connectors to the power supply" the question is how many power supplies do i connect i am using a arianet 850w supply but only 1 of the 6 block connectors fits into the graphics card the other block connector is a different fitting. Any help would be greatly appreciated thanks