Originally Posted by Korlus
According to specification, USB3 can deliver more power than USB2. If it's not powered (or just not powered well), then it's not up to specification. Could it be a problem with the drive itself? Have you got any friends with USB3 motherboards/expansion cards?
I have one of those Asus U3S6 cards but I've never even loaded the USB3 drivers.
If I were the OP, I'd be removing anything on the SATA6 ports and plugging a USB drive in there to see if there's any
Looks like USB3 not only has more power but also have a "Super Power" mode that can power devices that normally took two USB2 ports IF that mode is avaliable....like in the Gigabyte ad.
BUT, since his drive was OK with a USB2 port I would think the USB3 port isn't powered or isn't working correctly.