Manufacturers often add a fast port and a slow port... but never indicate which is which.

USB-C cables look identical but behave differently. WhatCable shows Mac users exactly what each cable supports.

Have you ever wondered whether your USB ports are really delivering maximum power? There are several ways to find out. Windows offers you built-in functions to check the performance of your USB ports.

USB cables may look the same and serve the same basic functions, but some will support fast charging and others won't. Here's ...

USB-C cables are notoriously hard to identify, but these three numbers will help you figure out what they can do.