The board has now run for three days in my MacBook Pro (Mid. 2007) and does its job without any problems! It is much faster than my old Toshiba, but also a bit noisy because of the higher speeds. If the Macbook is on the table, listening and you can feel a very slight vibration with a barely perceptible hiss. Yet I do not feel this work sound as annoying! Power is in my comfort before :)