I bought this camera because does not have USB 3.0 port. It has two connectors: one to attach to a USB 2.0 port on the motherboard to power the card reader part and PCI Express connector for USB 3.0 4 sockets. Finally, just plug in a standard MOLEX power to close everything. For installation, even under Windows 7, you must use the mini-cd provided to facilitate its recognition. This is perfect and my USB 3.0 drives are finally fast as expected.