What is PCIe ? PCI Express 4 explained

2 into a normal PCIe x1 slot, and leaves the remaining 3 lanes unconnected Gen 4 drive at full speed in a PCIe slot: WD SN850 1TB in x4

PCIe has retro-compatibility, that's for the X16 slot you use for the GPU and the M possibly SATA controlled

pciex16 slot In comparison, PCIe Gen4 operates at 16 GTs, converting to about 2 GBs per PCIe lane PCIe Gen4 is the fourth generation of the PCI Express specification As

pcie slot configuration gen1 gen2 gen3 Apparently the cross-compatibility and quality are quite variable PCIe = gen3 seems easier than gen4, though, and for your needs it sounds