Test software for your PassMark USB 3.0 loopback plug

  • Versions: V2.0 (Build 1009)
  • Latest release date: 14 February 2020
  • Price: Free with the purchase of a PassMark USB 3.0 loopback plug (See USB 3.0 loopback plug pricing details)
  • Platforms: Vista, Windows 7, 8, 10 & 11, plus Windows 11 ARM. Linux is not supported.
  • Requirements: 128MB RAM, 1MB Disk space


USB3Test is an easy to use Windows based application that allows users to quickly check that all the USB ports on their PC are functioning correctly and allows them to determine the maximum speed of these ports (and hence whether they are configured as expected).

USB3Test is designed for use in conjunction with PassMark's USB 3.0 loopback plug and will test USB 3/0 ports at SuperSpeed (up to 5Gb/s) and will test USB 2.0 ports at High-speed (up to 480Mb/s) and Full-speed (up to 12Mb/s) rates.

USB3Test when used together with a USB 3.0 loopback plug has the following features:

  • A loopback mode where a user controlled (start/stop) number of data packets may be looped for reliability testing. 
  • A benchmark mode where the maximum read and write speeds are determined for a user selected port. Ten packets are written out the USB port and ten packets are read from the USB 3.0 loopback plug.
  • Selection from a list of USB ports that have PassMark USB 3.0 loopback plugs connected.
  • Selection of plug's enumeration speed to test and benchmark USB port at USB3 and USB2 speeds.
  • User selectable loopback data of user specified constant data, incrementing sequence data or random data.
  • User selectable loopback verification or no verification.
  • User selectable detection of physical and link layer transmission errors
  • Saving of loopback and benchmark result data to a user specified file.
  • The display of port information, such as, SuperSpeed (up to 5 Gb/s) HighSpeed (up to 480 Mb/s) or FullSpeed (up to 12Mb/s).
  • The display of loopback results, such as the number of packets looped, number of verification failures and the number of recoverable errors (ie. re-transmission).
  • The display of benchmark results, such as the result for each of the twenty packets sent/ received and the overall benchmarked result.
  • A comprehensive help file.

The USB3Test utility can only be used with the PassMark USB 3.0 loop back plug.

Testing using the USB 3.0 loopback plug - software comparison

The USB 3.0 loopback plug may be used with either:

  • USB3Test V1.0 or above. Distributed with the USB 3.0 loopback plug and downloadable (see below).

  • BurnInTest V9.0 Professional or above.

A comparison of both software applications in respect of USB testing is shown below.

Feature USB3Test V1.0
or above
BurnInTest V9.0 Pro
or above
BurnInTest Linux V4
or above
SuperSpeed (USB3.0) HighSpeed (USB 2.0) or FullSpeed (USB 1.x) port indication Yes Yes Yes
USB 3.0 loopback testing Yes Yes Yes
USB 3.0 Benchmarking Yes Yes No
Supports PassMark USB 3.0 loopback plug  Yes Yes Yes
Supports PassMark USB 2.0 loopback plug  No Yes Yes
Supports simultaneous testing of multiple USB ports No Yes Yes
Support simultaneous testing of multiple PC components No (USB only) Yes Yes
Scripting of test runs No Yes Yes
Logging Yes. Basic results Yes. User selectable detail. Real time. Yes. User selectable detail. Real time.
Error reporting Yes. Verification errors, detection of low-level physical layer and link layer transmission errors. Yes. Greater detail of error type reporting. User definable error classifications and text. Yes. Greater detail of error type reporting. User definable error classifications and text.
User configuration of loopback test data Yes No (Random data) No (Random data)
Windows Vista, Window 7, 8 , 10 , 2008 Server support Yes Yes No
Windows 95, 98, ME, NT, Mac support No No No
Linux support No No Yes
Bulk Transfer Size Adjustments Yes No No
Isochronous Transfer Size Adjustments Yes No No