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

In this video, I tested the PCIe gen 3 slots to see if there is any performance difference when

Xgig CEM-slot, 4-lane Interposer Module for PCI Express The PCIe4, 4 3 NVMe SSD for input to the VIAVI PCIe Analyzer Xgig , 4

nvme in pcie slot PCIe is backward compatible It's also forward compatible So, you can insert PCIe expansion cards into PCIe slots, but your data

nvme vs m2 slot Intel® Z790 ATX Gaming motherboard, 16+1+1 power stages, PCIe® , DDR5 memory, four slots, WiFi 7 and Intel Gb Ethernet, HDMI™,