SIIG 4-Port USB 3.0 PCIe Card with 4 Dedicated 5Gbps Channels (USB 3.2 Gen 1) - Quad Core 20Gbps - UASP - SATA Power - Low Profile PCIe Adapter Card

The SIIG 4-Port USB 3.0 PCIe Card is a high-performance upgrade designed to unlock blazing-fast external storage, peripherals, and accessories for your desktop. This advanced adapter adds four independent USB 3.0 Type-A ports to your system, each capable of delivering up to 5Gbps of real-world data transfer. With its quad-core design, you gain a combined theoretical bandwidth of up to 20Gbps across all four ports, ensuring that multiple devices can run at peak speed simultaneously without bottlenecks. Built with UASP support, the card optimizes transfer efficiency, reduces CPU overhead, and accelerates data movement for external drives, quick backups, photo and video editing workflows, and a wide range of USB peripherals. The included SATA power connection guarantees stable power delivery to high-demand devices, while the low-profile form factor makes this card an ideal upgrade for compact desktops and HTPC builds.

• Four independent USB 3.0 ports offer dedicated bandwidth for each device, delivering up to 5Gbps per port for fast external drives, high-speed flash storage, gaming peripherals, and more.
• Quad Core 20Gbps total potential across all ports mirrors the productivity and versatility of today’s USB ecosystems, enabling simultaneous, high-speed data transfers without sacrificing performance on any single device.
• UASP-enabled performance improves throughput and reduces CPU usage by optimizing data transfers between the host and connected devices, providing quicker file copies and smoother media workflows on supported devices.
• SATA power support ensures stable, reliable power to power-hungry drives and devices, minimizing the risk of underpowered USB devices and allowing you to connect larger external hard drives with confidence.
• Low-profile PCIe adapter with flexible brackets fits most desktop cases, including compact builds, and includes both low-profile and full-height brackets for easy integration in a wide range of chassis configurations.

Technical Details of SIIG 4-Port USB 3.0 PCIe Card

• Interface: PCIe (minimum PCIe x1) – compatible with PCIe slots on standard or low-profile motherboards
• USB Ports: 4 x USB 3.0 Type-A ports, each capable of up to 5Gbps
• Speed: Individual ports support up to 5Gbps; aggregate theoretical bandwidth up to 20Gbps across all ports
• Power: SATA power connector included to provide additional power for high-demand devices
• Form Factor: Low-profile PCIe card with both low-profile and full-height brackets included for versatile installation

How to install SIIG 4-Port USB 3.0 PCIe Card

1) Power down your computer and unplug all cables. Open the PC case to access the motherboard and PCIe slots.

2) Locate an available PCIe slot (preferably PCIe x1 or higher). Remove the appropriate expansion slot cover on the back of the case.

3) Gently insert the SIIG PCIe card into the slot until it seats firmly. Secure the card to the chassis with a screw to hold it in place.

4) If you are using high-demand external devices, connect the SATA power cable from your power supply to the card’s SATA power connector to ensure stable power delivery.

5) Attach the preferred bracket (low-profile or full-height) to the card if it isn’t already installed, then close the case. Reconnect power and boot the computer.

6) Upon startup, the operating system should recognize the new PCIe USB controller. In most cases, Windows and modern Linux distributions install drivers automatically. If prompted, allow the system to complete the driver installation. You can then connect USB devices to the four newly available ports and begin transferring data at USB 3.0 speeds.

Frequently asked questions

Q: Do I need to install drivers for this USB 3.0 card?
A: In most cases, modern Windows and Linux operating systems will recognize the card automatically and install generic USB 3.0 drivers. Some older operating systems or specific motherboard configurations may prompt for drivers. If prompted, follow the on-screen instructions to complete the installation.

Q: Can I power external hard drives from this card?
A: Yes. The card includes a SATA power connector to provide extra power for high-demand devices, helping to prevent underpower scenarios that can cause unreliable performance or disconnects.

Q: Will all four ports run at full speed simultaneously?
A: Each port is capable of up to 5Gbps when connected to compatible USB 3.0 devices. Real-world speeds depend on device performance and USB cables, but the card is designed to deliver dedicated bandwidth per port to minimize contention.

Q: Is this card compatible with USB-C or USB 3.1/3.2 devices?
A: The card provides four USB 3.0 Type-A ports. USB-C or newer USB standards are not native on the card, but USB-C devices with appropriate adapters can connect to the USB-A ports. For best performance, use USB 3.0/3.1 Gen 1 devices compatible with Type-A connectors.

Q: Does the card include mounting brackets for all cases?
A: Yes. The package includes both a low-profile bracket and a standard full-height bracket, enabling installation in compact mini-tower cases and larger desktops alike.