User Manual
Quick-Start Guide
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Manual Revision: August 27, 2020
Product Diagram (PEXUSB321C)
Front Angle View
Port Function
1 USB-C Port
• Connect a USB Peripheral Device
• SuperSpeed USB 20Gbps
2 Bracket
• Congurable for Full Prole and Low Height
installations
3 PCIe x4 Connector
• Connect the USB Card to the PCI Express® Slot in
the Computer
Requirements
For the latest requirements, please visit:
www.startech.com/PEXUSB321C.
• Computer with an available PCI Express slot (x4, x8, or x16)
Tools
• Small Phillips Head Screwdriver
Hardware Installation
Warning: USB Cards can be damaged by static electricity. Make sure that the
Installer is properly grounded before they open the Computer Case or touch the USB
Card. The Installer should wear an Anti-Static Strap when installing any computer
component. If an Anti-Static Strap is not available, discharge any built-up static
electricity by touching a large Grounded Metal Surface for several seconds. Only
handle the USB Card by its edges and do not touch the gold connectors.
1-Port USB Card - SuperSpeed USB 20Gbps - 1x USB-C® - PCIe
Installing the Low Prole Bracket
By default the Full Prole Bracket is attached to the USB Card. Depending on the
system conguration it may be necessary to remove the Full Prole Bracket and
replace it with the Low Prole Bracket (included).
1. Using a Small Phillips Head Screwdriver, remove the two Bracket Screws securing
the Full Prole Bracket to the USB Card.
2. Align the Screw Holes on the USB Card with the Screw Holes on the Low Prole
Bracket. Making sure the USB Card is sitting on-top of the Screw Holes on the Low
Prole Bracket.
3. Insert the Bracket Screws through the USB Card and into the Screw Holes on the
Low Prole Bracket.
4. Using the Small Phillips Head Screwdriver, tighten the Bracket Screws, being
careful not to over-tighten.
Installing the USB Card
1. Turn o the Computer and any Peripheral Devices that are connected
(e.g. printers, external hard drives, etc.).
2. Unplug the Power Cable from the rear of the Computer and disconnect any
Peripheral Devices that are connected.
3. Remove the Cover from the Computer Case.
Note: Consult the documentation that came with the Computer for details about
how to do this safely.
4. Locate an open PCI Express Slot (x4, x8, or x16) and remove the corresponding
Metal Cover Plate from the rear of the Computer Case. In most instances, the
Metal Cover Plate is attached to the rear of the Computer Case with a single
Screw. Save this Screw for the next step.
5. Gently insert the USB Card into the open PCI Express Slot and fasten the Bracket
to the rear of the Computer Case using the Screw from step 4.
6. Place the Cover rear onto the Computer Case.
7. Reconnect the Power Cable to the rear of the Computer.
8. Reconnect all of the Peripheral Devices that were disconnected in step 2.
9. Connect a USB Peripheral Device to the USB-C Port on the USB Card.
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