GTX 285 power issue

I've just installed a GTX 285 in my early 2008 MacPro. The card requires 2 power-cords from the mother-board.

I also have a firewire PCIe card in slot 3, which is underpowered. It provides 12v. out. The Firewire PCIe card have the option for extra power in on the card. I has a 4 pin power socket. My question is were to get the power from, since the GTX 285 card are using both my motherboard's power sockets. Is there an option of using any of the contacts atop of the GTX 285 card as a power out?
Are any of them repeaters?

Thanks,
spaceX