Product information: 4 Port USB 3.0 (900mA per port) PCI Express Card (PEXUSB3S4)The PEXUSB3S4 4-Port PCI Express SuperSpeed USB 3.0 Card (with SATA Power) adds 3 external USB 3.0 ports and an internal USB 3.0 port to any PCI Express-enabled computer system. With SuperSpeed USB 3.0, you can reach data transfer speeds up to 5 Gbps, while still being backward compatible with existing USB 2.0 devices at 480Mbps.
With a built-in SATA power connector, each USB port can provide up to 900mA of power to USB 3.0 devices (500mA for USB 2.0) by connecting to your computer power supply. Compatible with both Low profile/half-height or Full profile computer cases, this card is backed by a StarTech.com 2-year warranty and free lifetime technical support.
The StarTech.com Advantage
SuperSpeed USB 3.0 connectivity at up to 5 Gbps and 80% more power than USB 2.0
Dual profile design to fit into Full or Low Profile/small form factor (SFF) systems
Uses a SATA power connector for compatibility with newer systems that have limited or no LP4 power supply connections, to ensure maximum power for USB devices