SIIG''s USB 3.0 7-Port (Ext) PCIe Host Card allows you to add seven SuperSpeed USB 3.0 external ports to your desktop computer via a PCI Express slot to enhance your system''s USB connectivity performance. It supports 5Gb/s ultra-fast USB 3.0 data transfer rate and provides up to 900mA power output per port with over-current protection to ensure smooth and reliable data transmission. This is a great USB port expansion solution to enable a variety of external device connections for maximum productivity. Features Quickly adds seven external USB 3.0 ports through an available PCI Express slot for connecting a variety of external USB devices Supports SuperSpeed USB 3.0 data transfer rates up to 5Gbps providing fast and smooth data transmission Supports UASP (USB Attached SCSI Protocol) and increases data transfer speed with external storage devices especially for SSDs Each port provides power output up to 900mA and features Over-Current protection to further protect your connected devices Multi-port feature allows connecting several existing peripheral devices simultaneously and avoids frequent plug in and plug out