The system is stock as of right now. I never heard the Seagate Barracuda
make any noise when booting, though I wasn't looking for it. There are no cable select pins. My two old hard drives are SATA, but connected on the SATA II connections. They show up, and the two ports for the intel chipset show up, however when the Barracuda
is plugged into one of those, it is not present.
One interesting thing to note is that when I connected the hard drive to the Marvell SATA III connectors, when loading the computer took more time to recognize that "there is no hard drive connected to the Marvell."Here is the link to the Asus website page for the mobo I am using.