I use the adapter in a Thinkpad T520 to operate an external USB 3.0 hard drive. Unfortunately, the board recognizes the hard drive only in about 40% of all cases as a USB 3.0 device. On the website I looked after other drivers, but I already use the latest drivers. Perhaps it is the combination with Win7 64-bit?
So I would not recommend this card to buy. I will look after a different model, which hopefully works 100%.