PCIe: high-speed connectivity

PCIe: Life in the Fast Lanes

PCIe has gone through multiple revisions since its inception. But the different revisions all use the same physical connections, and those connections can come in four primary sizes: x1, x4, x8, and x16, also but rarely x32.


The different physical sizes allow for different numbers of simultaneous data pin connections to the motherboard: the larger the port, the more maximum connections, colloquially known as lanes, on the card and the port. Different revisions of the PCI-E standard allow for different speeds on each lane. 

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