Up to 4 USB 3.0/2.0 ports (2 ports on the back panel, 2 ports available through the internal USB header)
* In Windows XP, the Intel USB 3.0 ports can support up to USB 2.0 transfer speed.
Up to 6 USB 2.0/1.1 ports (available through the internal USB headers)
VIA VL800 chip:
Up to 4 USB 3.0/2.0 ports on the back panel
* Due to a Windows 7 limitation, please connect your USB device(s) to the Intel controlled USB port(s) (located below the RJ-45 LAN port) before the VIA USB 3.0 controller driver is installed."
So you can hook up the internal headers to a backplane expansion or if you have the VIA chipset, hook up the ports under the RJ45 first like it shows above. Got this from: http://www.gigabyte.us/products/product-page.aspx?pid=4441&dl=1#sp
Didn't know if you had Rev 1.0 or 1.1, so this is 1.1 revs info...