No, it isn't, the controller initiates most of what a drive does, other wise, you are just powering a logic board that's waiting for instructions.
By channel, I mean each individual sata connection on your motherboard. Instead of using the same connection on the motherboard over and over, have you tried a DIFFERENT channel, which, you answered yes in a previous post to this one.
The odds of a bad HDD twice in a row isn't common if they are obtained through two different companies, but if from the same one, then yours odds go up.
That narrows it down to a faulty controller or slightly fubared re-flash of your BIOS.