4x USB 3.1 Expansion Card with Dedicated Controllers
PEXUSB3S44VMain Features
- Provides four external, independent USB 3.0 Ports
- Supports up to 20 Gbps total transfer bandwidth - Up to 5 Gbps per port
- 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 1.0/1.1 devices
- Includes a Low Profile/half-height installation bracket
- Hot-swap feature to connect/disconnect devices without powering down the syste
Frequently Asked Questions
The card provides 4 external USB Type-A (9 pin) ports, each running at USB 3.0 SuperSpeed (5 Gbps). Each port is backward compatible with USB 2.0 and USB 1.0/1.1 devices.
Each of the four ports has its own dedicated 5 Gbps channel, since the card uses four independent host controller chipsets instead of a single shared bus. This gives a total available bandwidth of up to 20 Gbps across all four ports.
The card includes an optional internal power connector — either a 4-pin LP4 (Large Drive Power) or a 15-pin SATA power connector — that you can connect to your system's power supply. When connected, it can deliver up to 900mA per USB port for USB 3.0 bus-powered devices (500mA for USB 2.0 devices). It also supports USB Battery Charging Specification 1.2 in Apple Mode only, for faster charging of compatible iPhones/iPads.
Operating temperature range is 0°C to 50°C (32°F to 122°F), storage temperature is -20°C to 60°C (-4°F to 140°F), and humidity range is 5~85% RH.
The card supports Windows Vista, 7, 8, 8.1, and 10; Windows Server 2008 R2, 2012, 2012 R2, 2016, and 2019; and Linux kernel versions 2.6.31 to 4.11.x (LTS versions only). Note that UASP specifically requires Windows 8, 8.1, Server 2012, or Linux kernel 2.6.37 or later.
UASP (USB Attached SCSI Protocol) is a more efficient data transfer protocol than the traditional USB BOT (Bulk-Only Transport). It allows multiple commands to be processed simultaneously. In testing, UASP performed up to 70% faster on reads and 40% faster on writes than conventional USB 3.0 at peak performance, with up to an 80% reduction in required processor resources. UASP requires a compatible operating system.
You need an available PCI Express x4 or greater slot. The card's connector type is PCI Express x4, compliant with the PCI Express Base Specification Rev. 2.0.
The package includes the 4 Port PCIe USB Card, a Low Profile Bracket, a Driver CD, and an Instruction Manual.
The card ships with a standard profile bracket installed and also includes a low-profile/half-height bracket, so it can be installed in either standard or small form-factor (SFF) computer cases.
The card uses a Renesas/NEC PD720202 chipset.
How-to Guides
- Locate the internal power connector on the card, which accepts either a 4-pin LP4 (Large Drive Power) connector or a 15-pin SATA power connector.
- Connect an available LP4 or SATA power cable from your system's power supply to the card's internal power connector.
- With power connected, the card can deliver up to 900mA per USB port to bus-powered USB 3.0 devices (500mA for USB 2.0 devices), which is useful for high-power devices that need more current than the PCIe slot alone can provide.
- Power down the system and remove the card from the PCIe slot if already installed.
- Remove the standard profile bracket that ships installed on the card.
- Attach the included low-profile/half-height bracket in its place.
- Install the card into an available PCI Express x4 or greater slot in your small form-factor case.
- Power down the computer and insert the card into an available PCI Express x4 or greater slot.
- Optionally connect an LP4 or SATA power cable to the card for high-power USB devices.
- Power on the system and install drivers from the included Driver CD if required.
- Connect USB devices to any of the four external USB Type-A ports. The card supports hot-swap, so devices can be connected or disconnected without powering down the system.
The PEXUSB3S44V 4-Port PCI Express USB 3.0 Card lets you add four, dedicated 5 Gbps USB 3.0 ports to your PCIe x4-enabled PC. This independent port architecture improves USB 3.0 performance by transferring data on four individual 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 four host controller chipsets, each port operates on a separate independent transmission channel. Dedicating up to 5 Gbps to each USB port reduces performance bottlenecks, and effectively quadruples your total available to bandwidth to 20 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 (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-profile/half-height bracket for installation in small form-factor computers.
UASP is supported in Windows 8, 8.1, Server 2012 and Linux kernel 2.6.37 or later. In testing UASP performed with up to a 70% faster read / 40% faster write speed over traditional USB 3.0 at peak performance. At the same peak in testing, UASP also showed up to an 80% reduction in required processor resources.
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