PCIE 1x, 4x, 8x, 16x bus pins and signals

Different pinouts on each PCIe connector at the device end pcie slot pinout I'm not 100% sure but if I remember correctly mini PCIe used in laptops for WiFi or similar has different pinout then PCIe slots on desktop pcie slot pinout I was reading the mPCIe pinout of BPI-R2 and noticed this: And according to the mPCIe , pin 48 should be + instead of +5v,

pcie x 16 slot hi, actually the mini PCIe connector is designed to be fitted in a mini PCIe slot as pinout is compatible with that since mini PCIe has several