I started my first build today. I think I have everything connected correctly, but this is my first problem. I put my X800XL into my PCI-E mobo, I turned on the computer and I'm getting a message and the computer is beeping. The message says "The video card is not properly connected to the power supply, please refer to the manual". The card didn't come with a cable to connect to the PSU. On top of that, my PSU only has 4 pin connectors and the GPU needs a 6 pin connector. I thought the PCI-E version of this card didn't need to be connected to the PSU.