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

installing Gen4 NVME on a Gen3 Motherboard pcie gen 4 in gen 3 slot PCIe x4 x8 x16 Slot USB Type C · 1 out of 5 stars 50+ bought in HP EX900 Plus 256GB NVMe SSD pcie 20 x16 slot Do I have 3rd gen or 4th gen PCIe slots? · · Impossible to tell from your screenshots · @Ramhound Yes, that product line ·

pcie slot splitter Make certain that you have updated your GEN 3 capable motherboard with the latest Motherboard BIOS and set the PCIe slot to the appropriate speed, not Auto It