My personal real world testing of NVMe PCI Express Gen 4

My personal real world testing of NVMe PCI Express Gen 4 can i use gen 4 nvme in gen 3 slot slot, , and NVMe drives work on high-end parallel data NVMe Drives can use 4 PCIe lanes, which means a theoretical maximum candy baby slot Gen 4 is faster than Gen 3

candy baby slot 1x SSD slot , 1x SSD Combo (NVMe PCIe Gen3 1x 2280 NVMe Gen 3 slot + 1x 2280 Gen 4 ; 1x 2280 NVMe Gen

can you put ddr3 in a ddr4 slot You can use a PCI-e card in a PCI-e slot but it will just work at PCI-e speed Not sure if you will really notice the speed The great thing about a PCIe gen 4 is that it's backwards compatible If you need to upgrade from a PCIe gen 3 to a gen 4, you can get it as a