PrologyParts Index

STARTECH.COM PEXUSB311AC3

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

MPNPEXUSB311AC3STARTECH.COMAdaptersUpdated

Key facts

Part number
PEXUSB311AC3
Brand
STARTECH.COM
Category
Adapters
Price
AUD 114.39≈ USD 79.05 Reference price (RRP)
Availability
On request — ask for a quote

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

Reference price history

Recorded reference and list prices over time. Not Prology selling prices.

Latest
AUD 114.39≈ USD 79.05
Oct 2026
Lowest recorded
AUD 114.39≈ USD 79.05
Highest recorded
AUD 114.39≈ USD 79.05
Recorded
2026
1 price point

AUD 114.39 rrp, recorded

Buy or sell STARTECH.COM PEXUSB311AC3

Buying STARTECH.COM adapters

Looking to buy the STARTECH.COM PEXUSB311AC3 or a compatible adapter? Prology supplies new, refurbished and used STARTECH.COM adapters in Australia and the United States. Send the part number and quantity for a firm price.

Selling STARTECH.COM adapters

Have a spare or decommissioned PEXUSB311AC3? Prology buys used and surplus STARTECH.COM adapters — single units or whole lots — and replies with an offer within 1 business day. Sell your PEXUSB311AC3.

What is the STARTECH.COM PEXUSB311AC3?
The STARTECH.COM PEXUSB311AC3 is a STARTECH.COM adapter – USB Adapter - PCI Express x4 - Plug-in Card - Red - UASP Support - 2 Total USB Port(s).
How much does the STARTECH.COM PEXUSB311AC3 cost?
The reference price on record is AUD 114.39 (Oct 2026). It is a reference figure, not a selling price — ask Prology for a firm quote.
Where can I buy the STARTECH.COM PEXUSB311AC3?
It is not listed on the Prology store yet. Prology sources STARTECH.COM adapters on request — request a quote and we reply with a firm price and lead time within 1 business day.
Can I sell a used STARTECH.COM PEXUSB311AC3?
Yes. Prology buys used and surplus STARTECH.COM adapters, including the PEXUSB311AC3. Get an offer — sell outright or trade in against your next order.

Request a quote for PEXUSB311AC3

Tell us the quantity and condition you need. Prology replies with a firm price and lead time within 1 business day.

Replies within 1 business day. Your details are used only to answer this request — privacy.

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