Could someone please advise, i use a corsair cx500 on current s1 and never a glitch, i notice that there are 2 spare molex 4 pin connectors on psu,  i can buy adapter for these on ebay to convert molex to pci-e , so my question is would this work with the the s3 (total 12v output from psu is max 456w) for the two othe pci-e on the boards.  Afterall its only another 30 watts more?