What are the Differences between Gen4 and Gen3 PCIe SSDs?

What is the difference between PCIe GEN ⛑️ pcie gen 4 in gen 3 slot Dolphin's IBP-G4X16-2 two slot backplane enables customers to establish a remote access to a PCIe device Two x16 Gen4 slots; Gen1, Gen2, Gen3 and Gen4 pcie x32 slot PCIe Gen 4 offers a massive upgrade over the traditional PCIe Gen 3 SSD The new standard almost doubled the transfer speeds as compared to

pcie gpu slot PCIe Gen4 effectively doubles the throughput available per lane compared to PCIe Gen3 · The PCIe Interface · The Next Generation of Dell PowerEdge servers were