I've noticed this being listed.
Also, off topic but possible connection - I downloaded SpeedFan and it caused a BSOD when I launched it.
Anyway, what is this Unknown device, (research shows up to being ASUS chipset) I downloaded (I think) some sort of drivers but it did not remove this unknown device.
OS : Windows 7 Proff 64 SP1
CPU : AMD FX-6100 Six-Core processor (3.3Ghz)
RAM 8.00 GB
Motherboard : ASUSTek Computer INc. m5A78L-M/USB3 (AM3R2)
Graphics NVidia GeForce GTX 660 Ti