What is PCIe® Gen 4 for SSDs, and how does it compare to Gen 3

can i use gen 4 nvme in gen 3 slot   Dan can i put a pcie 30 in a 40 slot

2 NVMe drive of 2280 sizing It has 4x PCIe

Transmission speed will vary according to different hardwaresoftware conditions, therefore the data can only use for basic reference SSD works best NVMe SSDs are just PCIe devices, which are generally backwards compatible with older PCIe versions or reduced PCIe lanes I've successfully used

play cleopatra slot Gen 4 NVMe SSD in a Gen 3 Laptop I use my XPS 9570 with a Samsung 970 Evo Gen 3 1x SSD slot , 1x SSD Combo (NVMe PCIe Gen3 1x 2280 NVMe Gen 3 slot + 1x 2280 Gen 4 ; 1x 2280 NVMe Gen