To answer your PM:
A M.2 Gen2 x2 slot has a bandwidth of 10Gbps. Note that this is ten Gigabits, not Gigabytes. This works out to 1.25GBps, which means that the SSD will operate at a maximum of ~1.25 Gigabytes per second transfer rate when installed in your motherboard.
To put that into perspective, that is a little more than twice the rated speed of a Samsung 850 EVO series SSD.