Not hear sorry, i read on this site on one thread. Owner on the mobo with USB3 say, when he have pluget something in USB3, his Graphic Card go slowly.
And it's posible, this is first mobo with USB3 and SATA3. So, maybe have a foult.
Whatever i don't have HDD with SATA3 and i will wait for my mobo with USB3 and SATA3. Sorry for bad English...
Well there are always satisfied and dissatisfied users with a board but in the reviews i read about USB 3.0 motherboards i didn't see anything like this.
Also do you know what he/she plugged in the USB 3.0 port which made the graphic card to run slowly ? because USB 3.0 devices are still few(like some external HDDs)