Differences Between M2 Cards M2 Slots Keys Sizes and Types

What is the difference between PCIe Gen 3 and PCIe Gen 4? can i use m 2 pcie 4 0 in 3 0 slot It won't work well but it will work So, what I need is a NVMe x4 passive adapter card, which will plug the into a normal PCIe x1 slot, and can you use ddr4 in ddr5 slot If two SSDs are installed in a “Dual NVMe PCIe adapter” and the adapter is plugged in either PCIe slot2 or slot7

canine carnage slot You can insert a PCIe SSD card into a motherboard with PCIe slots, but this SSD won't be able to make full use of the higher bandwidth