one can still use the USB-C ‘power input’ on the SBC as a host controller. This way one can have both PCIe x1 and USB on a Raspberry Pi 4.

You might have heard the term “bifurcation” if you’ve been around PCIe ... get sixteen x1 links out of a single x16 slot – usually, the supported combination is four x4 links out of ...

There are four different PCIe slots that you'll find on your motherboard. These are PCIe x1, x2, x4, x8, and x16; the more lanes you have available on a slot, the more data can be transmitted and ...