M.2

[Dogsparky]

I am thinking of going to m.2 form factor ssd at some point so I want to learn a bit of this 

 

First of all I have noticed there are M.2 Sata but confused about the difference between the pcie and nvme besides speed which is confusing because how can something be pcie or Sata if it is connected with a m.2 slot?

 

So basically different between m.2 sata,nvme and pcie because ei have seen pcie m.2 that don't fit in the pcie slot

[PCGeek]

M.2 is different than SATA or NVMe.  One is just a slot while the other is an interface protocol.  M.2. can host be either SATA or NVMe.  NVMe doesn't necessarily have to even be exclusive to M.2.  It can use U.2 or even just plug into your PCIe slot directly.  The Intel 750 series SSDs are NVMe but come in PCIe and U.2 formats as opposed to M.2.  The best way to think of M.2 is that it's bridge to you're PCIe bus and actually it is because it utilizes your PCIe lanes.