I have a question about multi rail +12V capacity on a Gigabyte Superb E720 PSU with 4x +12V rails each with an 18A capacity. The Gigabyte PSU has 2x 6+2 Pin PCI- E 2.0 connectors and 4x 4-pin Molex connectors. Each +12V rails is listed with a Cable Color: +12V1 is Yellow/Blue, +12V2 is Yellow/White, +12V3 is Yellow and +12V4 is Yellow/Black. How is the 18A per rail distributed across the connectors? Each 2x 6+2 Pin PCI- E 2.0 connector can supply 18A? How about the other 2x 18A rails? Do they supply power thru the 4 Molex connectors? how? Thanks.