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

What is the difference between PCIe Gen 3 and PCIe Gen 4? pcie x 16 slot The Riser from Dell™ fits into the PCI-E slot of your Dell System Riser cards are used to extend a slot for a chip or card in a fully loaded computer pcie gen 4 in gen 3 slot You can down and up plug pci-e devices meaning you could put a videocard in that pci-e 16x size slot but if it is a highend

pcie gen 4 in gen 3 slot You can down and up plug pci-e devices meaning you could put a videocard in that pci-e 16x size slot but if it is a highend

pcie slot gpu The Riser from Dell™ fits into the PCI-E slot of your Dell System Riser cards are used to extend a slot for a chip or card in a fully loaded computer  You can run 2 separate cards fine with that motherboard The first pciE slot you would place your main card to render your main screen while