Nikel flow level, I have a motherboard USB 2.0 simply and honestly, I felt a difference in rate of writing and reading with this USB key 3 compared to what I had in USB 2. The only concern I noticed is that you insert it several times into the USB slot for it to be recognized by Windows 7 (even on a Mac). I noticed that one should not insert it by pressing hard but just linsérant "nicely" into the USB socket ... At this level, it is a key way for that price. Transfer rates by cons are a little forget this mishap ... I advise this still ;-)