![PCI, PCI Express and USB radio clocks](https://d27wgn5g4t3wja.cloudfront.net/img/f6d563ee-1422-08df-aa2b-9df8cc59ab55/263302.png)
PCI, PCI Express and USB radio clocks
Meinberg Funkuhren GmbH & Co. KG (Meinberg)
Although the PCI Express is PCI-compliant, PCIe cards are based on a different concept. Less lines are used to transfer the data, for example in the case of PCI plug-in cards.