Julito, tu placa te la está jugando.
Mi placa tiene ese chip y funciona...
USB Chipset:
Up to 8 USB 2.0/1.1 ports (4 on the back panel, including 2 eSATA/USB Combo, 4 via the USB brackets connected to the internal USB headers)
2 x Renesas D720200 chips and 2 x VLI VL810 hubs:
Up to 10 USB 3.0/2.0 ports (6 on the back panel, 4 via the USB brackets connected to the internal USB headers)
* The USB 2.0 signals of the 6 USB 3.0/2.0 ports on the back panel are from the Chipset.