PCI Express x1 edge connector drawing with pin numbers. The basic board design for a PCIe PCB is highly reminiscent of that of PCI cards. Both use an edge connector with a similar layout.

PCI Express (PCIe) was introduced in 2002 as "Third Generation I/O" (3GIO), and by the mid-2000s, motherboards had at ... serial lanes (x1-x32) that transfer in parallel. Each lane is full duplex ...