Features: 1. Support PCI low profile. 2. Built-in 15-pin SATA power connector for added power and better support for power-hungry bus-powered devices. 3. Ideal connection for digital cameras, scanners, printers, external CD/DVD/Blu-ray burners, hard drives, flash drives, etc. 4. Fully compatible with plug and play and hot swap. 5. Support for 32-bit and 64-bit Windows Vista / Server 2008 / Windows 7. 6. Compliant with USB3.0 specification version 1.0. 7. Support low speed (1.5Mpbs) / full speed (12Mbps) / high speed transmission (480Mbps) / ultra high speed (5Gbps). 8. Supports all USB-compliant data transfers as follows: Control / Bulk / Interrupt / Synchronous Transfer. 9. Up to 5Gbps maximum transfer rate. Specification: Material: PCB Size: about 12*7.9*1.8cm/4.72*3.11*0.71in Maximum transfer rate: up to 5Gbps USB3.0 master: NECuPD7207201 Package List: 1 * PCI Express Card 1 * Software Driver CD 1 * User Manual 1 * Baffle 2 * Screw Note: For maximum throughput, the PCI-Express slot must be 2.0 or higher. If multiple ports simultaneously transmit data due to limited throughput of the PCI-Express slot, the performance of each port may be degraded. System Requirements: PC with 512MB RAM and 1.0GHz or faster processor One available PCI Express 1.x or 2.x slot 32-bit and 64-bit for Windows Vista/Server 2008 / Windows 7 1. To meet USB 3.0 transfer speed, high quality USB 3.0 cables and devices are required. 2. supports 32-bit and 64-bit operating systems. 3. Make sure the power connection is good, otherwise you will see the "Hub Hub on Hub Port" message error and the USB port does not have 5V bus power. 1、Built-in 15-pin SATA power connector for added power and better support for power-hungry bus-powered devices. 2、Ideal connection for digital cameras, scanners, printers, external CD/DVD/Blu-ray burners, hard drives, flash drives, etc. 3、Fully compatible with plug and play and hot swap. 4、Support for 32-bit and 64-bit Windows Vista / Server 2008 / Windows 7. 5、Support low speed (1.5Mpbs) / full speed (12Mbps) / high speed transmission (480Mbps) / ultra high speed (5Gbps).