What are the Differences between Gen4 and Gen3 PCIe SSDs?

Differences Between M2 Cards M2 Slots Keys Sizes and Types pcie 4 m 2 in pcie 3 slot Two types of PCIe slot on an Asus H81M-K motherboard Various slots on a computer motherboard, from top to bottom: PCI Express x4; PCI Express x16; PCI Express pcie x1 in x16 slot One lane of PCIe = 16Gbs , and as NVMe requires 4 lanes, with the new PCIe technology being released, with the the new

pcie slot width You're referring to NVME based M2 SSDs, correct? But yes if the SSD is PCIE spec then of course the speed will be less when used on PCIE