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 gen 4 in gen 3 slot For example, PCIe Gen 3 x1 slots have a bandwidth speed of 1 Gbps, and PCIe Gen 3 x16 has 16 Gbps of connection speed However, current pcie 2 slot Slot configurations without DWCM​ ; Slot 36, PCIe x8, Empty ; Figure 4 Rear view with 4 PCIe slots ; Riser 1, x16x8x8 , x16x16E ; Slot 1

pcie 2 slot As mentioned above, a single PCIe slot can have x1, x2, x4, x8, or x16 lanes For example, PCIe x8 refers to a Gen 4 expansion cardslot

pcieslot Slot configurations without DWCM​ ; Slot 36, PCIe x8, Empty ; Figure 4 Rear view with 4 PCIe slots ; Riser 1, x16x8x8 , x16x16E ; Slot 1 2 x16 Gen 4 Card uses PCIe , which doubles the bandwidth per lane compared to PCIe With four slots, it offers up to 256 Gbps of bandwidth per card,