Everything works fine except multicard reader. What is strange is it working for a while and after some restarts the pc nothing !! It is then necessary to disconnect the internal USB 3 port, reconnect it and go again. What is strange is that the USB port 3 has no malfunction when it is connected to the same internal port (Mystery !!). The problem seems to come from multi-card reader. I just found the latest drivers and now everything works fine. The USB3 card reader is very fast, so the problem came from the controller board.