I just installed a LaCie USB 3.0 PCI Express Card in my Vista 64-bit computer and plugged in a Seagate FreeAgent GoFlex Desk 2TB USB 3.0 external drive. The card literature says the transfer rate for USB 2.0 ranges up to 480Mb/s, and for USB 3.0 up to 5 Gb/s. If "Gb" means gigabits, the 5 Gb/s = 640 MB/s (five gigabits equals 640 megabytes). According to HD Tune, I am getting 106-113 MB/s on the Seagate. Is this a reasonable transfer rate for USB 3.0? I know that in the real world I'll never get 640 MB/s, but 106-113 seems a bit low. In any event, it tests faster than my SATA HD, which came in at 66-109 MB/s.