djONz, for this kind of behavior I will recommend you to check if you are running the latest BIOS available for this motherboard.
If you connect the USB 3.0 hard drive on the ports located at the front of the board, which is the behavior?
Which is the AA# of your motherboard?
Problem solved. I didn't think of the most obvious. Shame on me...
Thanks a lot!
No problem Michael!! I'm really glad to know your system is working now.