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STARTECH.COM

STARTECH.COM PEXUSB311AC3

USB Adapter - PCI Express x4 - Plug-in Card - Red - UASP Support - 2 Total USB

MPNPEXUSB311AC3AdaptersUpdated

Key facts

Part number
PEXUSB311AC3
Brand
STARTECH.COM
Category
Adapters
Price
AUD 114.39≈ USD 79.86 RRP
Availability
On request — ask for a quote

The STARTECH.COM PEXUSB311AC3 is an adapter listed in the Prology Parts Index. RRP AUD 114.39≈ USD 79.86 (Oct 2026). Request a quote for volume pricing, or sell us your used adapters.

Overview

This USB 3.1 Gen 2 card lets you add one USB-C™ port and one USB-A port to your computer, through a PCI Express slot. It enables you to upgrade your current system by adding two USB 3.1 Gen 2 ports to your computer and giving you access to data transfer speeds up to 10Gbps per port. USB 3.1 Gen 2 (also known as USB 3.2 Gen 2x1) PCIe Add-On card supports Multiple INs, maintains optimal bandwidth even when mixed speed devices are connected.

Plus, by adding one USB-C and one USB-A port to your PC, you can easily connect legacy, modern, and future USB devices, regardless of the USB connector type.

USB 3.1 Gen 2 Performance

By adding 10Gbps USB ports to your computer, you can harness the speed of USB 3.1 Gen 2 and rest assured you're ready for both current and future high-bandwidth USB-A and USB-C devices.

With higher data throughput support, this USB 3.1 PCIe card is a necessity for external drives, drive enclosures, and many other USB 3.1 peripherals. Plus, the expansion card with SATA power enables supplemental power to the USB ports (when motherboard power is insufficient) providing up to 5V 3A/15W via the USB-C port and 5V 0.9A/4.5W via the USB-A port. The card is ideal for use with high performance external storage solutions.

Compatible with Older USB Devices

Connecting older peripherals isn't a problem. This versatile dual-port USB 3.1 card is backward compatible with legacy USB 3.0/2.0 devices that use the common USB Type-A port, so you can eliminate the added expense and aggravation of purchasing new devices. You can also connect older devices on the USB Type-C™ port using a variety of USB-C cables and adapters.

Easy Installation

The USB 3.1 card is compatible with a broad range of Windows®, macOS and Linux® operating systems. Plus, the high-quality card includes both standard-profile and low-profile brackets, making it easy to install in full or small form-factor PCs and servers.

Faster Transfer Speeds with UASP

The card supports USB data transfer speeds of 10Gbps. But, you can experience transfer speeds up to 70% faster than conventional USB, when connected to a computer that also supports UASP. With UASP you can utilize the full potential of a SATA III SSD or HDD. UASP is supported in Windows® 8, macOS (10.8 or above), and Linux®.

In testing, UASP performs with a 70% faster read speed and 40% faster write speed over traditional USB 3.1 Gen 2 at peak performance.

At the same peak in testing, UASP also shows an 80% reduction in required processor resources.

  • USB Adapter plug-in with PCI Express x4 host interface
  • Featuring 2 USB ports to connect USB-compatible devices

Specifications

General

UASP Support
Yes
Host Interface
PCI Express x4

Mac OS X 10.13 High Sierra

Total Number of USB Ports
2
Number of USB 3.1 Ports
2
Platform Supported
PC

Mac

Weight (Approximate)
48.2 g
Form Factor
Plug-in Card
Length
119.4 mm
Height
17.8 mm
Width
81.3 mm
Product Color
Red
Product Type
USB Adapter

Manufacturer Website Address

Product Name
USB 3.1 Card

Price history

Latest
AUD 114.39≈ USD 79.86
Oct 2026
Lowest recorded
AUD 114.39≈ USD 79.86
Highest recorded
AUD 114.39≈ USD 79.86
Recorded
2026
1 price point

AUD 114.39 rrp, recorded

Why buy from Prology

  • Tested before dispatchEvery item is checked by our technicians before it ships.
  • Warranty includedParts are covered by a Prology warranty – ask us for the terms.
  • Fast shippingDispatched from our Australian and US locations.
  • Real people, quick repliesQuotes and answers within 1 business day.

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