How many internal power ports does a 2009 Mac Pro Have?

I want to add a new video card (Sapphire 7850 or the EVGA Nvdia GT680) and a USB 3.0 PCIe card.  But all the cards I find requre separate power, especially the graphics cards with require two.  So is there a third power port for the USB card available.  Or can I get some sort of splitter?

No, I just plan to keep one video card in the machine.  Must of the PCI cards I have seen have a 4-pin connector on the board.  My guess is that it is not for the controller card, per se, but to pass power on to unpowered attachments, such as a portable drive (e.g. WD My Passports,)
I hae a SSD drive that takes up the lower optical bay.

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