What Is an Slot and What Devices Use the Slot?

NVMe SSD to PCIe X16X8X4 Card pcie m2 slot GIGABYTE PCIe SSD 512GB · Form Factor: 2280 · Interface: PCI-Express x2, NVMe · Total Capacity: 512GB* · Warranty: Limited 3-years · Sequential pcie 4 ssd in pcie 3 slot 2 SSD slot on your motherboard These slots are similar to PCIe expansion slots but are much smaller And this makes them perfect for SSD drives

pcie 4 m2 in pcie 3 slot 2 drives are “keyed” at one end so as to prevent the end-user from inserting them in an incompatible socket PCIe NVMe drives are 'M' keyed SATA ones,