I have a modxstream pro 700w modular psu and it has 2 +12v rails each at 25A which is easily enough to power 2 560s, however the modular cables included are one 6 pin and a seperate 8 pin. The psu only has to ports to plug in PCIE cables, meaning I can only use the included cables to power one 560. Do molex to 6 pin and molex to 8 pin adaptors provide the power necessary to power another 560? Feel free to leave any questions below. Also, sorry if this is in the wrong section. I couldn't choose between power supplies and graphics cards :/