What is the power output of this PCIe card?

The power output of this PCIe card is up to 15W.

What is included in the package when I purchase this card?

The package includes the PCI Express USB Card, a Full Profile Bracket (installed), a Low Profile Bracket, and a Quick-Start Guide.

Is this USB card compatible with Linux operating system?

Yes, this USB card is compatible with Linux operating systems.

Can this PCIe card enhance the USB speed of my older computer?

Yes, this PCIe card can enhance the USB speed of your computer if it has a PCI Express x4 slot or higher and supports USB 3.2 Gen 2x2 speeds.

Can I use this product with USB 2.0 devices?

Yes, this product supports all older USB 3.1/3.0/2.0 devices.

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Main image of StarTech.com PEXUSB321C 1-Port USB 3.2 Gen 2x2 PCIe Card - USB-C SuperSpeed 20Gbps PCI Express 3.0 x4 Host Controller Card - USB Type-C PCIe Add-On Adapter Card - Expansion Card - Windows & Linux (PEXUSB321C)

Alt view image 2 of 5 - StarTech.com PEXUSB321C 1-Port USB 3.2 Gen 2x2 PCIe Card - USB-C SuperSpeed 20Gbps PCI Express 3.0 x4 Host Controller Card - USB Type-C PCIe Add-On Adapter Card - Expansion Card - Windows & Linux (PEXUSB321C)

Alt view image 3 of 5 - StarTech.com PEXUSB321C 1-Port USB 3.2 Gen 2x2 PCIe Card - USB-C SuperSpeed 20Gbps PCI Express 3.0 x4 Host Controller Card - USB Type-C PCIe Add-On Adapter Card - Expansion Card - Windows & Linux (PEXUSB321C)

Alt view image 4 of 5 - StarTech.com PEXUSB321C 1-Port USB 3.2 Gen 2x2 PCIe Card - USB-C SuperSpeed 20Gbps PCI Express 3.0 x4 Host Controller Card - USB Type-C PCIe Add-On Adapter Card - Expansion Card - Windows & Linux (PEXUSB321C)

Alt view image 5 of 5 - StarTech.com PEXUSB321C 1-Port USB 3.2 Gen 2x2 PCIe Card - USB-C SuperSpeed 20Gbps PCI Express 3.0 x4 Host Controller Card - USB Type-C PCIe Add-On Adapter Card - Expansion Card - Windows & Linux (PEXUSB321C)

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StarTech.com PEXUSB321C 1-Port USB 3.2 Gen 2x2 PCIe Card - USB-C SuperSpeed 20Gbps PCI Express 3.0 x4 Host Controller Card - USB Type-C PCIe Add-On Adapter Card - Expansion Card - Windows & Linux (PEXUSB321C)

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USB 3.2 Gen 2x2 PCIe card has 1x USB Type-C port supporting SuperSpeed 20Gbps
Host controller card with ASMedia ASM3242
USB-C PCI Express expansion card supports Multiple INs for max bandwidth w/mixed-speed devices
Adapter card w/UASP support optimizes USB performance w/ SSDs/HDDs/NVMe drives
Up to 15W of power
Install add-on card in full or low-profile PCI-e 3.0 x4 slot
Win/Linux/macOS w/auto drivers on Windows 8 and up
Supports all older USB 3.1/3.0/2.0 devices

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Best Seller Ranking	#52 in Add-On Cards

Model
Brand	StarTech.com
Model	PEXUSB321C

Details
Type	PCI Express to USB Card
External USB Ports	USB Type-C (24 pin, Gen 2x2, 20Gbps)
Standard	USB 3.2 Specification Rev. 1.0 PCI Express Base Specification Rev. 3.0 Intel xHCI Specification Rev. 1.1 UASP (USB Attached SCSI Protocol) Rev. 1.0
Data Transfer Rate	20Gbps
Operating Systems Supported	Windows 8, 8.1, 10 Windows Server 2012 R2, 2016, 2019 macOS 10.13 to 10.15, 11.0 Linux 3.5 or later LTS version only
Compatibility	PCI Express enabled computer or server with a PCI Express x4 slot or higher (x8, x16) Note: The card's USB-C ports are standard data throughput port. They do not support DP Alt Mode or USB Power Delivery. The maximum throughput of this card is limited by the bus interface. PCI Express Gen 1.0 max throughput is 10Gbps. A PCI Express Gen 2 or Gen 3 port is required to reach speeds up to 20Gbps.
Specifications	Ports: 1 Interface: PCI Express x4 Bus Type: PCI Express Card Type: Standard Profile (LP bracket incl.) Chipset ID: ASMedia - ASM3242 Maximum Data Transfer Rate: 20Gbps Type and Rate: USB 3.2 Gen 2x2 (20Gbps) UASP Support: Yes MTBF: 3,126,209 Hours

Features
Features	USB 3.2 Gen 2x2 PCIe card has 1x USB Type-C port supporting SuperSpeed 20Gbps Host controller card with ASMedia ASM3242 USB-C PCI Express expansion card supports Multiple INs for max bandwidth w/mixed-speed devices Adapter card w/UASP support optimizes USB performance w/ SSDs/HDDs/NVMe drives Up to 15W of power Install add-on card in full or low-profile PCI-e 3.0 x4 slot Win/Linux/macOS w/auto drivers on Windows 8 and up Supports all older USB 3.1/3.0/2.0 devices

Dimensions & Weight
Dimensions	0.9" x 3.1" x 2.0"
Weight	1.3 oz.

Packaging
Package Contents	PCI Express USB Card Full Profile Bracket (Installed) Low Profile Bracket Quick-Start Guide

Additional Information
First Listed on Newegg	September 17, 2025

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StarTech.com PEXUSB321C 1-Port USB 3.2 Gen 2x2 PCIe Card - USB-C SuperSpeed 20Gbps PCI Express 3.0 x4 Host Controller Card - USB Type-C PCIe Add-On Adapter Card - Expansion Card - Windows & Linux (PEXUSB321C)

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Item#: 9SIA1K6KKC1741

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StarTech.com PEXUSB321C 1-Port USB 3.2 Gen 2x2 PCIe Card - USB-C SuperSpeed 20Gbps PCI Express 3.0 x4 Host Controller Card - USB Type-C PCIe Add-On Adapter Card - Expansion Card - Windows & Linux (PEXUSB321C)

Learn more about the STARTECH PEXUSB321C

Customer Reviews of the STARTECH PEXUSB321C

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info