PCIe 4 vs PCIe 3: Do you need Gen 4 in 2020?

Since Nvidia graphics cards currently generally force a fallback to , a PCIe slot will only run on , as PCIe x16 @16 and

A single PCIe slot can now support x16, x8, x4, x2, or x1 lanes For example, PCIe x4 indicates a Gen 3 expansion slotcard with four lanes

pcie slot function Two types of PCIe slot on an Asus H81M-K motherboard Various slots on a computer motherboard, from top to bottom: PCI Express x4; PCI Express x16; PCI Express

pciex1 slot IBP-G4X16-3 Backplane PCIe Gen 4 Expansion 3 slot backplane 3 Slot x16 Gen4 Add-On card Slot Speed, x8 Gen4 Active Switch Components, No (passive