All MSI X99 motherboards will come with Turbo M.2. Gen3 x4 which can deliver up to 32Gb/s data transfers which is 3x faster than a normal M.2 slot. Combine this with a Samsung XP941 M.2 SSD and your system will reach the speed of light.
@Pierre3400: I have yet to see a X99 board where the M.2 slot is not PCI-E 3.0 x4. In case of Z97 boards it is available only at few boards of one manufacture which is not MSI (hint: search for Ultra M.2).
If you are looking at my specs in signature, they dont match my new setup, which is MSI X99s Sli Plus. Looking for M.2 I can find a few, but non fall into the area of "Ultra"
Your board has : 1 x M.2 port, supports up to 32Gb/s speed** M.2 port supports 4.2cm/ 6cm/ 8cm length module 32Gb/s speed = Ultra M.2/Turbo M.2/Gen3 x4/PCI-E 3.0 x4.