I know the standard Thunderbolt WD19TB only comes with a 180w power supply and my Alienware m17 R3 requires 240w. So my question is, I have a Prevision 5560 for work and a WD19TB with the USB-C power adapter. My m17 R3 is the old style round power plug. Can I hook up the WD19TB and plug it into the USB slot and use the functionality of the WD19TB and the power from my Alienware power adaptor at the same time? Will this hurt my m17 R3?