PrologyParts Index

STARTECH.COM PEXUSB312A3

USB Adapter - PCI Express 3.0 x4 - Plug-in Card - Black - UASP Support - 2

MPNPEXUSB312A3STARTECH.COMAdaptersUpdated

Key facts

Part number
PEXUSB312A3
Brand
STARTECH.COM
Category
Adapters
Price
AUD 79.19≈ USD 54.73 Reference price (RRP)
Availability
On request — ask for a quote

Overview

This PCIe USB 3.2 Gen 2 controller card installs into an available PCI-Express x4 slot in your computer and enables you to upgrade your current system by adding two SuperSpeed USB-A (10Gbps) ports.

Add two 10 Gbps USB Type-A Ports to Your Desktop Computer

The controller card enables you to connect two USB-A Gen 2 (10 Gbps) devices to your desktop computer. The USB-A ports are ideal for connecting USB devices such as external hard drives and solid state drives or powering and syncing your mobile devices. The USB-A ports provides up to 4.5W (5V/0.9A) of power per USB port, and are backward compatible with USB 3.2 Gen 1 (5 Gbps), and USB 2.0 (480 Mbsp) devices.

Note: USB 3.2 Gen 2 (10 Gbps) is also know as USB 3.1 Gen 2 (10 Gbps), and USB 3.2 Gen 1 (5 Gbps) is also know as USB 3.0 and USB 3.1 (5 Gbps).

SuperSpeed USB 3.2 Gen 2 (10 Gbps) Performance

The USB 3.2 Gen 2 card features an ASMedia ASM3142 host controller that utilizes x2 lanes of the PCIe 3.0 bus, making the card capable of speeds up to 10Gbps on each port, and enabling fast access to high-performance devices like NVMe drives and SSDs. The controller card supports Multiple INs to reduce bandwidth loss when multiple devices are connected, even when connected through a USB Hub (Note: The USB hub must also support this feature). The card also supports UASP for improved performance with storage devices.

Wide Installation Compatibility

This add-on card includes both full-profile and low-profile installation brackets ensuring you can install it into either a full or low-profile PCIe 3.0 x4 slot (backward compatible w/PCIe 2.0). For wide platform support the card is compatible with Windows, Linux and macOS. For hassle-free installation the drivers install automatically on computers running Windows 8 or higher. Works w/USB 3.1/3.0/2.0 devices

  • Adds a port to your PC through the PCI Express 3.0 x4 interface
  • With 2 USB ports, connect/disconnect devices while not having to shut down the system

Specifications

General

UASP Support
Yes
Host Interface
PCI Express 3.0 x4

Mac OS X 13.0 Ventura

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

Linux

Product Type
USB Adapter

Manufacturer Website Address

Product Name
USB 3.1 Card
Weight (Approximate)
79.4 g
Form Factor
Plug-in Card
Length
109.2 mm
Height
17.8 mm
Width
119.4 mm
Product Color
Black

Reference price history

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

Latest
AUD 79.19≈ USD 54.73
Oct 2026
Lowest recorded
AUD 79.19≈ USD 54.73
Highest recorded
AUD 79.19≈ USD 54.73
Recorded
2026
1 price point

AUD 79.19 rrp, recorded

Buy or sell STARTECH.COM PEXUSB312A3

Buying STARTECH.COM adapters

Looking to buy the STARTECH.COM PEXUSB312A3 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 PEXUSB312A3? Prology buys used and surplus STARTECH.COM adapters — single units or whole lots — and replies with an offer within 1 business day. Sell your PEXUSB312A3.

What is the STARTECH.COM PEXUSB312A3?
The STARTECH.COM PEXUSB312A3 is a STARTECH.COM adapter – USB Adapter - PCI Express 3.0 x4 - Plug-in Card - Black - UASP Support - 2 Total USB.
How much does the STARTECH.COM PEXUSB312A3 cost?
The reference price on record is AUD 79.19 (Oct 2026). It is a reference figure, not a selling price — ask Prology for a firm quote.
Where can I buy the STARTECH.COM PEXUSB312A3?
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 PEXUSB312A3?
Yes. Prology buys used and surplus STARTECH.COM adapters, including the PEXUSB312A3. Get an offer — sell outright or trade in against your next order.

Request a quote for PEXUSB312A3

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