A simple way to test, benchmark, and diagnose USB-C ports — USB4 compatible, up to 20 Gb/s USB-C ports all look the same from the outside, but they don’t always behave the same. Some run slower than they should. Some quietly drop data. Some work fine for a few minutes and then fail under heavy use. The USB-C 20G Loopback Plug is a small, pocket-sized tool that helps you find these problems fast. Plug it into any USB-C port, run a test, and you get clear answers about speed, e
