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

PCIE Pinout doubts and Problems Cyclone V pcie slot pinout Graphic cards use the longest PCI x16 slots PCIe x1 interface has 36 pins arranged in pairs of 18 pins Out of 36 pins, only 6 pins are functional pins and the pcie x1 slot function 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 gpu Host Adapters ; PCIe Host Port PCIe x16 Edge Finger ; Internal PCIe Port Two SFF-8654 8x 85ohm 74pin Connectors Connector Pinout ; Switch for enabling REFCLK