Going to buy a new cable, but it seems odd that it works just fine in the 2.0 ports, but not in either of the 3.0 ports. If the cable was bad, it would seem like it would have the same issue plugging in to a 2.0 port. As I said before, the "power" light does come on but does not make a connection. Could it be there's not enough power coming from the port, to make a good connection? If the new cable doesn't fix the problem, my next call is to Alienware support! It is under warranty!