Hello, I have the corsair gs 600w psu and a gtx 660 i am looking to upgrade the 660 to a 780 however to do that i need a psu 4 pin to 8 pin pci-e adapter. I have looked them up and apparently they don't put out the 150w needed for the 780, is this true? and also if anyone could recommend me a 4 pin to 8 pin pci-e adapter (or a molex one i don't mind which ever is best) that would be awesome. Thanks!