Since I was the owner of a USB3.0 card with 2 ports and wanted more. Therefore I bought this with 4 ports. AND ??? Put a plate at start-up of a connection, the driver for the card is not loaded. , Restart Out plugs. Whether the card is now detected, is a matter of luck - I have detected no system. During operation, the map approved (with all attached devices) and you must have at least 2x restart - if all else fails, you have to completely disconnect the PC from the power supply so that it is at all recognized. The return is a corollary; and since there is only one trader Amazon, is also problematic than directly from Amazon.
