NVMe SSDs in practical tests: What is the real advantage of PCIe

NVMe SSDs in practical tests: What is the real advantage of PCIe m 2 4 0 in 3 0 slot The card physically has an X4 interface, so it could be plugged into an X4, X8, or X16 slot It can still physically only access 4 lanes (else m2 slot mainboard 2 Slot is from the Ryzen 7 5700G then it will only support PCIe Found this tech site that explains that a Motherboard can have both PCIe and slots:

m2 slot mainboard 3 Best 2TB+; 4 Best for Steam Deck; 5 Best for PS5; 6 Best PCIe 5; 7 How to spot the best deals

m2 slot NVMe drive will get maximum performance in a pcie 4 slot, but I'm trying to get a sense of how the latest drives perform in pcie 3  Hi, I installed a samsung 980PRO ssd on my X570 GAMING PLUS motherboard in the slot, nothing both in bios and windows does not detect the