I need to go from my power supply's 8 pin ATX output to the 8 pin PCIE on my graphics card. I realize the pin configuration is different, but I have both connectors. I want to make them into an adapter. Can I just cut the wires and match up yellow to yellow (12v) and black to black (grounds)? I know PCIE has 2 voltage regulating wires (which are also black) so I wasn't sure. The reason I have to do this is because I threw away the wires that came with my PS, thinking I wouldn't need them. Now I do.

Thanks