StarTech.com 4 Port PCI Express USB 3.0 Card w/ 2 Dedicated Channels - UASP

The PEXUSB3S42V 4 Port Dual Bus PCI Express USB 3.0 Card lets you add four dual bus USB 3.0 ports to your PCIe x4 enabled PC. Dual bus architecture improves USB 3.0 performance by transferring data on independent channels to your computer, giving you faster file transfers. When multiple devices are connected, traditional single bus USB 3.0 cards share your maximum bandwidth between all ports. By employing a second host controller chipset, the dual bus transmission channel is shared across two ports rather than four. Allocating up to 5 Gbps for each set of two ports reduces performance bottlenecks, and effectively doubles your total available to bandwidth to 10 Gbps. 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 increasing transfer speeds for less wait time on data transfers. See our UASP test results below for further details. For high power USB devices, this PCIe USB 3.0 card includes an optional SATA or LP4 power connector to connect to your system power supply and deliver up to 900mA of power per port to USB 3.0 bus powered devices 500mA for USB 2.0. The USB 3.0 card also supports USB Battery Charging Specification 1.2 Apple Mode only, letting you charge compatible Apple devices iPhones and iPads faster than a standard USB 3.0 port. The controller card is compliant with USB 3.0 standards while offering backward compatibility with existing USB 2.0 1.1 devices. For added versatility, the USB 3.0 PCIe card is equipped with a standard profile bracket and includes a low profilehalf height bracket for installation in small form factor computers. Features Provides four external, dual bus USB 3.0 Ports Supports up to 10 Gbps total transfer bandwidth Up to 5 Gbps per two ports UASP support across all four ports PCIe x4 interface compliant with PCI Express 2.0 specifications Optional LP4 or SATA power connector provides up to 900mA per USB port Supports USB Battery Charging Specification 1.2 Apple Mode only Fully compliant with USB 3.0 rev 1.0 and Intel xHCI rev 1.0 specifications Backward compatible with USB 2.0 and USB 1.01.1 devices Includes a Low Profilehalf height installation bracket Hot swap feature to connectdisconnect devices without powering down the system