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StarTech 2-Port 10Gbps USB-A/USB-C PCIe Card -USB 3.1 Gen 2 PCI Express
SKU# AC40674, Model# PEXUSB311AC3


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SKU # AC40674 | Model # PEXUSB311AC3 | Brand StarTech

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USB 3.1 Gen 2 or USB 3.2 Gen 2x1 PCI Express Adapter card supports Multiple INs maintains max bandwidth w/mixed speed devices | Upgraded version of our popular USB card PEXUSB311AC2 - Expansion Host Controller card w/ 1x USB-A/1x USB-C 10Gbps per port - USB-A/USB-C PCIe Card w/ UASP optimizes USB performance w/external storage devices SSDs/NVMe drives - SATA power for up to 5V 3A/15W (USB-C) + 5V 0.9A/4.5W (USB-A) - Install in full or low-profile PCIe 3.0 x4 slot (works w/PCI-e 2.0)

Manufacturer Warranty: 2 Years Limited Warranty
Manufacturer Contact Info: http://www.StarTech.com.au,

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.

The PEXUSB311AC3 is backed by a StarTech.com 2-year warranty and free lifetime technical support.


Connector Type(s) PCI Express x4 Male
External Ports USB 3.1 USB Type-A (9 pin, Gen 2, 10 Gbps) Female
  USB Type-C (24 pin) USB 3.1 (10Gbps) Female
Internal Ports SATA Power (15 pin) Plug
Humidity 20~80% RH
Operating Temperature 5°C to 50°C (41°F to 122°F)
Storage Temperature -20°C to 85°C (-4°F to 185°F)
Bus Type PCI Express
Card Type Standard Profile (LP bracket incl.)
Chipset ID ASMedia - ASM3142
Industry Standards Intel xHCI Specification Rev. 1.1
  PCI Express Base 3.0 Specifications
  USB 3.2 Specifications
Interface PCI Express x4
Ports 2
Packaging Information
Package Height 3 cm [1.2 in]
Package Length 14.2 cm [5.6 in]
Package Width 17 cm [6.7 in]
Shipping (Package) Weight 0.1 kg [0.3 lb]
Maximum Data Transfer Rate 10Gbps
MTBF 2,684,396 Hours
Type and Rate USB 3.2 Gen 2 - 10 Gbit/s
UASP Support Yes
Physical Characteristics
Color Red
Material Steel
Product Height 1.9 cm [0.7 in]
Product Length 12 cm [4.7 in]
Product Width 8.1 cm [3.2 in]
Weight of Product 48 g [1.7 oz]
Description CDW 75 - 1st Line StarTech.com 2-Port 10Gbps USB-A/USB-C PCIe Card -USB 3.1 Gen 2 PCI Express
Microsoft WHQL Certified Yes
OS Compatibility Windows® 7, 8, 8.1, 10 Windows Server® 2008 R2, 2012, 2016, 2019 Linux® 3.5 to 4.11.x macOS 11.0, 10.15, 10.14, 10.13
Special Notes / Requirements
Note The card's USB-C port is a standard data throughput port. It does not support DP Alt Mode or USB Power Delivery
  The maximum throughput of this card is limited by the bus interface
System and Cable Requirements Optional SATA power connector
  PCI Express enabled computer or server with a PCI Express x4 slot or higher (x8, x16)
What's in the Box
Included in Package Full Profile Bracket (Installed)
  Low Profile Bracket
  Quick-Start Guide
  USB 3.1 Card


SKU # AC40674 | Model # PEXUSB311AC3

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