Wanted to report my solution for anyone else who finds this with the same problem. The Dell Precision laptop has a BIOS setup parameter under the Display menu (reboot, enter BIOS setup, click Display) called Direct Output which will connect the NVidia to the output ports no matter what. This is OFF by default. Once I set it to ON and rebooted, everything ran perfectly and the Cosmos Elite worked just fine through the USB-C via a Display Port adapter.