Instruction Manual
1
Introduction
The PEXUSB3S400 PCI Express x4 USB 3.0 Card (with SATA Power) adds 4 independent
external USB 3.0 ports to any PCI Express x4-enabled computer system. SuperSpeed
USB 3.0 provides up to 5 Gbps of data bandwidth, while remaining backward
compatible with existing USB 2.0 devices at 480Mbps.
With each port being indpendent, full bandwidth is available per port, instead of
shared between ports. This allows for maximum transfer rates if multiple devices are
connected.
Using a “stacked” port layout that places the ports one on top of the other, more ports
are able to t into a smaller space. This 4-port PCIe x4 USB 3.0 adapter enables all four
USB 3.0 ports to be external facing, while still allowing the card to t into a small form
factor/low prole computer system.
Plus, with a built-in SATA power connector, each USB port can provide up to 900mA of
power to devices that draw power from a host bus connection (500mA for USB 2.0) by
connecting to your computer power supply.
The PEXUSB3S400 USB 3.0 PCIe x4 card is backed by a StarTech.com 2-year warranty
and free lifetime technical support.

Packaging Contents

• 1x PCIe USB 3.0 Card
• 1x Low Prole Bracket
• 1x Driver CD
• 1x Product Manual

System Requirements

• PCI Express enabled computer system with available x4 slot
• Available SATA power connector from the computer power supply
• Microsoft® Windows® XP (32/64-bit)/Server 2003 (32/64-bit)/Vista (32/64-bit)/Server
2008 R2/7 (32/64-bit)/8 (32/64-bit)