What size PCIe card slot do I need?

What size PCIe card slot do I need? pcie slot sizes Generally speaking, there are five physical sizes of PCIe cards: x1, x4, x8, x16, and x32 (FYI, PCIe x32 does exist with a maximum of 32 lanes, pcie 40 in 30 slot PCI vs PCIe Slot · PCI-E x16 slot: It is 89mm long and has 164 pins It is often used for graphics cards and backward compatible with x1 x4

pcie 40 in 30 slot Ultra Durable PCIe Slot • PCIe® Slot ‧ Lower temperature, smaller size, better thermal characteristics PCIe * Hardware Design 1 PCIe Slot

pcie 50 slot Common slot configurations include x1, x4, x8, and x16, which represent the number of data lanes available for communication  PCIE - The PCIE is Samtec's PCIe® Gen 3 compliant edge-card connector The PCIE -BE bottom entry option does not affect the pocket size -A alignment pin