Specifications:
• Compliant with PCI Specification 3.0
• USB 3.0 complies with Intel eXtensible Host Controller Interface (xHCI)
• Four (4) external 5Gbps SuperSpeed USB 3.0 ports (*1)
• Up to 2.133Gbps maximum transfer rate (*1)
• SuperSpeed USB 3.0 is backwards compatible with USB 1.0/1.1/2.0 devices (data transfer rate at 1.5/12/480Mbps)
• SuperSpeed USB 3.0 is fully compatible with original USB system, peripherals and cables
• Built-in with both 15-pin SATA power connector & mini 4-pin power connector for added power source to better support power hungry bus-powered devices (*3)
• Ideal connection for digital cameras, scanners, printers, external CD/DVD/Blu-ray writers, hard disk drives, flash memory drives and etc.
• Fully Plug-N-Play and Hot Swap compatible
• Supports Windows XP/Server 2003/Vista/Server 2008/Windows 7/Windows 8 (*2)

Electrical Specifications:
Power Input: 15-pin SATA power connector or mini 4-pin power connector
Output Voltage per Port: DC +5V
Output Current per Port: 900mA (max)
Operating Temperature: 0 ~ 40 ฐC

System Requirements:
• PC with 512MB of RAM and 1.0GHz or faster processor
• One (1) available PCI 2.x or 3.x slot
• Windowsฎ XP/Server 2003/Vista/Server 2008/Windows 7/Windows 8 (*2)

*1 PCI 2.x & 3.x slots will max out at 2.133Gbps. To meet available maximum transfer speed, high quality USB 3.0 cables and devices are required
*2 Supports both 32-bit & 64-bit OSes
*3 Make sure the power is well connected, otherwise you will see a "Power Surge on Hub Port" message error and no 5V bus power in USB ports.