Dual PCIe SSD Adapter Card NVMEAHCI -

A is the physical form factor SATA and PCIe refer to the storage interface, the primary difference is performance and protocol The

is a slot that can interface with SATA , PCI Express

m2 expansion slot Size: has three specifications: 2242, 2260, 2280, they just represent different sizes of SSD 2242 means 22 x 42 ,

m2 slot screw 2 PCIe drive may marginally expedite game loading and Windows boot times compared to a SATA SSD, the discernible difference is not substantial