The SmartBOB family of products are USB 2.0 and backward compatible with USB 1.1.
If connected to a USB 3.0 port they will run in USB 2.0 mode.
Even though your computer is fast, it is possible that your G code contains segments
so short that there is not sufficient time to transmit them relative to how long the
movement should take. Look to see if you have G code moves that are tiny, such
as less than a couple of thousandths of an inch.