What is the difference between PCIe Gen 3 and PCIe Gen 4?

Pcie Lanes Connectx-3 NIC question pcie 4 card in pcie 3 slot So, the PCIe or third-generation card will function when installed in a PCIe or second-generation slot as the PCIe standard is such that it is both pcie slot for gpu PCIe 4 is backwards compatible with gen 3, 2 & 1, and you will get at least the same performance from putting a drive in a slot as you

pcie x 16 slot “PCIe will not be supported on motherboards released prior to the X570, so 400-series and 300-series will have PCIe support,” an AMD