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Green circuit board with four blue USB Type-A ports and a low-profile metal bracket

SIIG, Inc

SIIG, Inc JU-P40811-S1 4-Port USB 3.0 PCIe Expansion Card

SKU CH-49QA-J6HFW MPN JU-P40811-S1

Adds four independent USB 3.0 Type-A ports via a PCIe 2.0 x4 slot with up to 5Gbps per port and 20Gbps total bandwidth

  • Typepci_x_4
  • External USB PortsPCI Express
  • Internal PortsPCI Express 2.0 x4
  • CompatibilityDevices with PCI Express interface and USB 3.0 support
  • Dimensions5.91 in x 0.79 in x 3.15 in
  • Weight0.15 lb
  • Adds four USB 3.0 ports at up to 5Gbps each
  • Renesas uPD720202 chipset delivers reliable high-speed performance
  • Low-profile bracket included for compact system builds
  • Independent over-current protection on every port safeguards connected devices
  • Supports UASP mode with Windows 8 and 10 drivers for faster transfers

Four Independent USB 3.0 Ports

The SIIG JU-P40811-S1 adds four external SuperSpeed USB 3.0 Type-A ports to a desktop computer via a PCI Express 2.0 x4 slot. Each port delivers up to 5Gbps data transfer for a total USB bandwidth of up to 20Gbps. The card uses the Renesas uPD720202 chipset and complies with the xHCI 1.0 specification. A low-profile bracket is included for smaller form-factor systems.

Suited For Expansion Needs

This card suits users who need to add multiple high-speed USB 3.0 connections to a desktop with an available PCIe x4 slot. It supports UASP mode with Windows 10 and 8 embedded drivers and provides independent over-current protection on each port. Builders whose systems lack a PCIe x4 slot or who require internal USB headers should look at alternative solutions.

Sustained Transfer Behaviour

Under sustained load, the four independent channels share the PCIe 2.0 x4 host interface bandwidth. The Renesas uPD720202 controller manages traffic across Low-speed (1.5 Mbps), Full-speed (12Mbps), High-speed (480 Mbps), and Super-speed (5Gbps) rates. PCI Bus Power Management 1.2 support helps maintain stable operation during extended data transfers.

주요 특징

  • Adds four USB 3.0 ports at up to 5Gbps each
  • Renesas uPD720202 chipset delivers reliable high-speed performance
  • Low-profile bracket included for compact system builds
  • Independent over-current protection on every port safeguards connected devices
  • Supports UASP mode with Windows 8 and 10 drivers for faster transfers

사양

BrandSIIG
ModelJU-P40811-S1
Part NumberJU-P40811-S1
Typepci_x_4
External USB PortsPCI Express
Internal PortsPCI Express 2.0 x4
CompatibilityDevices with PCI Express interface and USB 3.0 support
Dimensions5.91 in x 0.79 in x 3.15 in
Weight0.15 lb
배송 무게0.45 kg
포장 크기180 × 132 × 33 mm

이 상품에 대한 질문

Do I need a free PCIe 2.0 x4 slot on my motherboard to install this card?

Yes, the card plugs into a PCI Express 2.0 x4 slot and requires that physical connector to operate.

Will my USB 2.0 flash drives and older peripherals still work at their rated speeds when connected to the four Type-A ports?

Each port supports low-speed 1.5 Mbps, full-speed 12 Mbps and high-speed 480 Mbps modes alongside 5 Gbps SuperSpeed, so legacy devices run at their native rates.

How can I confirm the Renesas uPD720202 controller is active and delivering 5 Gbps per port after installation?

In Device Manager the controller appears as an xHCI 1.0 host; run a USB 3.0 flash drive benchmark and verify sustained read/write near 5 Gbps on each port.

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