For reference, the current standard is PCIe 5.0 which was introduced in 2019 and has since been adopted by the best motherboards with compliance for DDR5 RAM, meaning far superior ...

Support 16GT 8GT 5GT 2.5GT data rate ; Compliant with PCI Express 4.0, 3.1, 2.1, 1.1 and PIPE 4.2 standards ; x1, x2, x4, x8, x16 lane configuration with bifurcation ; Multi-tap adaptive programmable ...

Nowadays, most of the PCIe G4 platforms on the market are already equipped with this ... where the motherboard may have been a single X16 slot that was separated into two X8 slots by the bifurcation ...