The easiest way to differentiate a USB 3.0 port from the others is by looking at the color of the port. If it's colored blue, it's most likely a 3.0 version. However, not all USB 3.0 versions are colored blue. Therefore, you can look for a logo or any physical label that suggests the generation. As a last resort, you can always check 'USB controllers' under your computer's 'Device Manager' window.