Installing an M2 SSD into an Optiplex 7040

Installing an M2 SSD into an Optiplex 7040 m2 slot types If a system has an PCIe slot, an SATA SSD with identical keying will fit in the slot but will not work, and vice versa There are some systems that m2 slot types 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

m24 slot wallet Key E normally has PCIe x2, which is not as fast as PCIe x4 for other key types But still Can I attach a standard NVMe SSD to this socket?