Transmission speed measured with iperf on Crosslink from Mac to Unix ~ 890 Mbit / sec. It did not matter whether via the USB ports on the hubs large amounts of data are transmitted in parallel. Real can I a large file (3GB) with ~ 520 Mbit / s (~ 65 MB / s) transfer to computers with SDD from computers with SDD. As far as the adapter is top! However, the car negation is sometimes bitchy, even with an Intel 82544EI gigabit network card, otherwise with everything and everyone can be the Cable Matters adapter agreed only to 100Mbit FD. Therefore a star deduction.