# USB motherboard pinout 1

_Published: 2026-08-17_

[https://www.bestpcbs.com/blog/wp-content/uploads/2026/08/usb-motherboard-pinout-1.jpg](https://www.bestpcbs.com/blog/wp-content/uploads/2026/08/usb-motherboard-pinout-1.jpg)

A keyed internal USB motherboard header checked before PCB fabrication and assembly.