Hey Jim.
I think you are mistaken about the diagram you posted above regarding your usb header.
The thing you circled and labeled USB 3.0, that's not a set of USB 3.0 headers, they're USB 2.0/1.1 headers. The blue one in the center "just happens to be" number three, in a series of four headers from right to left, usb1 (white) usb2 usb3 usb4 (blue blue blue). I don't know where you got that nineteen pin cable, but it doesn't connect to those usb headers. I know, "duh", right. Anyhow, I looked up your motherboard and the specs on gigabyte's websited *and* the motherboard manual pdf both say that your usb 3.0/2.0 ports are just the two pre-built pre-installed ports on the back of the motherboard (they're blue, surprise).
Links.
http://www.gigabyte.com/products/pro...px?pid=3856#sp
look for info on usb resources.
manual for your mobo
http://download.gigabyte.us/FileList...a-d3h-b3_e.pdf
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Good luck man!