Hello. I have a 777 jetmax with overhead, 2 jetline computers. I noticed someone mention earlier about USB. My setup has a 777 printer and for some reason the printer stopped working - I couldn't figure out why it stopped printing - it had power, the computer recognized it, all settings were correct but wasn't printing. Then I remembered purchasing a 3.0 USB cable for the printer, swapping out the 2.0 USB cable. This is when the printer stopped working so I decided to reconnect the printer with the 2.0 USB cable and it started to print again. My conclusion, too much power / data transfer with the 3.0 USB cable for the printer to handle.