Universal Serial Bus - Wikipedia, the free encyclopedia: "On Microsoft Windows platforms, one can tell whether a USB port is version 2.0 by opening the Device Manager and checking for the word 'Enhanced' in its description; only USB 2.0 drivers will contain the word 'Enhanced.' On Linux systems, the lspci -v command will list all PCI devices, and a controllers will be named OHCI, UHCI or EHCI respectively, which is also the case in the Mac OS X system profiler. On BSD systems, dmesg will show the detailed information hierarchy."