USB 3.0 Loopback Plugs

For Troubleshooting and Testing USB 3.0 ports.

  • Quickest way to verify that your USB 3.0 ports are working correctly
  • Diagnose, troubleshoot and load test the USB functionality of your PC
  • For use with (and without) compatible PassMark testing software (see below).

Complete Diagnostic for USB 3.0 ports

Quick, on-board visual indication
In-depth measurements
Benchmark data transfer
Stress testing

By simply plugging in the Loopback plug, you can quickly confirm if the USB port is correctly powered.

Measure the voltage of the USB port as displayed on the LCD screen (accurate to ±0.1V)

The Red, Green and Yellow LED's on the device provides a quick visual indication of I/O activity and if the USB bus is powered.

Dramatically improve the troubleshooting and diagnostic ability of computer technicians and system integrators, who previously had no way to confirm the actual output of the USB port.

Can also be used to test self-powered USB hubs

When used with our free USB3Test application (for Windows) or BurnInTest Professional (for Windows) or BurnInTest for Linux , you can run data loopback and benchmark tests.

In benchmark mode (Windows only), the device is capable of reaching the maximum defined transfer speed for USB3.0 (5Gbit/sec). Note: Testing has shown that most PCs cannot attain speeds much above 3.5Gbits/sec and performance will vary depending on your motherboard, CPU and other USB devices connected to the PC.

Measure the level of recovered data (retransmitted frames)

Check that data can be sent and received from the port

Check USB errors rates and transmission speed (up to 5Gbits/sec ) in Windows

Benchmark your PC's USB port

Check if your PC ports are super speed 5Gbits/sec (USB 3.0), high speed 480Mbits/sec (USB 2.0) or full speed 12Mbits/sec (USB 1.x)

Verify that the system remains stable under long periods of load

Up to 10 of these USB test plugs can be simultaneously connected to a PC providing that free USB ports are available on the PC or on a downstream hub and sufficient power is available.

Can be used in conjunction with the USB Power Delivery Tester to test electrical load.

Stress testing

The only true USB 3.0 loop back adapters on the market

These test plug devices are unique! They have been especially designed for use with our BurnInTest Professional, BurnIntest for Linux software package or our USB3Test stand-alone application (supplied with device).

They do not require an external power supply and do not require a connection to any other port on a PC. Each plug also has its own serial number stored in EPROM on the plug, so they can be individually identified when multiple plugs are connected.

Each plug also contains its own CPU and executes its own firmware.

PassMark PCI Express PCIe Test Card Review

This is a demonstration on how to use PassMark USB 3.0 Loopback Plugs to test, troubleshoot, and benchmark USB ports.

Quickly check if a USB port is powered, check for errors, and bencmark transmission speeds using PassMark USB 3.0 Loopback Plugs.

Related hardware

USB Power Delivery Tester

USB Power Delivery Tester

USB 3.1 Type C Cables

USB 3.1 Type C Cables

PCIe Test Cards

PCIe Test Cards

USB 2.0 Loopback Plugs

USB 2.0 Loopback Plugs

Serial and Parallel Loopback Plugs

Serial and Parallel Loopback Plugs

Related software

BurnInTest Professional for Windows

BurnInTest