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Green circuit board with metal bracket, one USB-A and one USB-C port, SATA power connector

STARTECH

STARTECH PEXUSB311AC3 2-port USB 3.2 Gen 2 PCIe network card

SKU CH-Y4RZ-QABP8 MPN PEXUSB311AC3

Adds one USB-C and one USB-A port at 10Gbps each via PCIe x4 with SATA supplemental power

  • InterfaceHost Interface: PCI Express x4
  • FeaturesMedia & Performance UASP Support: Yes Interfaces/Ports Total
  • DimensionsHeight: 0.7" Width: 3.2" Length: 4.7"
  • WeightWeight (Approximate): 1.70 oz
  • Package ContentsUSB Adapter 1 x Low Profile Bracket 1 x Quick Start Guide
  • Add one USB-C and one USB-A port at 10Gbps each
  • Supplemental SATA power delivers 15W to USB-C and 4.5W to USB-A
  • UASP support optimises external SSD, HDD and NVMe performance
  • Fits full-height or low-profile PCIe 3.0 x4 slots
  • Windows, macOS and Linux drivers install automatically

What this card adds

This PCIe x4 card adds one USB-C and one USB-A port, each running at up to 10Gbps. It fits full-height or low-profile slots and works with Windows, macOS and Linux without extra drivers. Supplemental SATA power delivers up to 15W on the USB-C port and 4.5W on the USB-A port.

Who it suits and who should look elsewhere

Builders who need high-speed USB-A and USB-C ports on a desktop or server will find the bandwidth and power delivery useful. Systems limited to PCIe 2.0 slots will see lower performance. Buyers who require more than two ports or need internal drive connectors should consider other options.

Capacity and headroom

Each port sustains 10Gbps even when mixed-speed devices are attached, and UASP support keeps external SSDs and NVMe enclosures running efficiently. The 15W USB-C output handles bus-powered drives and accessories, while the 4.5W USB-A port covers standard peripherals. Total throughput is bound by the four-lane host link.

Highlights

  • Add one USB-C and one USB-A port at 10Gbps each
  • Supplemental SATA power delivers 15W to USB-C and 4.5W to USB-A
  • UASP support optimises external SSD, HDD and NVMe performance
  • Fits full-height or low-profile PCIe 3.0 x4 slots
  • Windows, macOS and Linux drivers install automatically

Specifications

BrandStarTech.com
Part NumberPEXUSB311AC3
InterfaceHost Interface:
PCI Express x4
FeaturesMedia & Performance
UASP Support:
Yes
Interfaces/Ports
Total Number of USB Ports:
2
Number of USB 3.2 Ports:
2
Number of SATA Ports:
1
Software
Operating System Supported:
Windows 7
Windows 8
Windows 8.1
Windows 10
Windows 11
Windows Server 2008 R2
Windows Server 2012
Windows Server 2016
Windows Server 2019
Windows Server 2022
Linux 3.5
Mac OS X 10.13 High Sierra
Mac OS X 10.14 Mojave
Mac OS X 10.15 Catalina
Mac OS X 11.0 Big Sur
Mac OS X 12.0 Monterey
Mac OS X 13.0 Ventura
DimensionsHeight:
0.7"
Width:
3.2"
Length:
4.7"
WeightWeight (Approximate):
1.70 oz
Package ContentsUSB Adapter
1 x Low Profile Bracket
1 x Quick Start Guide
Shipping weight0.60 kg
Package size173 × 140 × 33 mm

Questions about this item

What free PCIe slot width does this PEXUSB311AC3 card need?

It installs in a PCI Express x4 slot, either full-height or low-profile, and works in PCIe 3.0 or 2.0 with reduced performance on 2.0.

Will my older USB 2.0 or 3.0 devices still work when plugged into the USB-C or USB-A ports?

Yes, the ports are backward compatible with USB 3.2, 3.1, 3.0 and 2.0 devices, so legacy peripherals function normally.

How can I confirm the card is delivering 10 Gbps per port after installation?

Connect a USB 3.2 Gen 2 storage device and verify the link speed shows 10 Gbps in your OS device manager or by running a benchmark that reports the active transfer rate.

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