I picked up an fx8350/M5A97 MB for cheap ($130) upgrade from my 1100t.. Now medium works . Anyway, i had been getting some head tracking and loss of HMD connection using my PEXUSB3S44V 4-Port PCI Express adapter with both sensors and hmd plugged in. So i moved the HMD to the on-board USB 3.0 and noticed a huge difference in the fluidity of the tracking and have had zero issues since. Anyone else have a similar experience? The 4 port USB card has the recommended chipset by oculus.