This is the secondary header for an additional set of ports.
On modern motherboards, these labels designate the specific pins used to connect your case's front-panel USB ports. usb e12 vs usb e34
This is the point where many builders get confused. This is the secondary header for an additional set of ports
Ensure you are using the correct 19-pin cable. If your case uses older USB 2.0 connectors (usually 9-pin), they will not fit into these 3.0/3.2 headers without an adapter. usb e12 vs usb e34
Multi-port office docks, 1080p webcams, and keyboards/mice.