I'm installing a new graphics card that requires a 6pin and 8pin connection but only have two six pin cords. Will this adapter http://www.systemagnostic.com/wp-uploads/2013/02/2x6pin-to-8pin-PCIe.jpg be sufficient in converting 6pin power into 8pin power? or do I need one of these http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress6plus2