Wow... people still buy them?
I spent quite a bit of time working out the current loadings for my new workstation build and ended up buying SATA connectors to add to the existing PSU wiring. I also made molex to Sata adaptors as I ran out of connections on the PSU. Molex can take roughly 11amps per pin - Sata can carry 1.5amps per pin and they are grouped into sets of 3 to carry 4.5amps.
These adaptors are either faulty from the factory or seriously under spec so as not to be able to drive a hard drive - scary! I hope my home made ones last better than that!
Steve