2 Port PCIe USB3. 0 Card UASP 1 Int 1 Ext The PEXUSB3S11 PCI Express USB 3. 0 Card lets you add one internal, and one external USB 3. 0 port to your PC through a PCI Express slot. Featuring a native NEC PCI Express host controller chipset, the new USB 3. 0 standard supports transfer rates of up to 5Gbps, while still providing backward compatibility with older USB 2. 0 (480Mbps) and 1. 1 (12Mbps) devices. The inclusion of an internal USB 3. 0 connection provides the added benefit of compatibility with USB 3. 0-based internal storage solutions or front-bay hubs. Enhanced with UASP support (USB Attached SCSI Protocol), this USB 3. 0 controller performs up to 70% faster than conventional USB 3. 0 when paired with a UASP supported enclosure (Note: UASP requires a compatible operating system). Using a more efficient protocol than the traditional USB BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly incre