Posted by: peter j connell« on: April 06, 2018, 15:18:22 »
I would ignore this as, to all intents, complete misinformation folks.
We do know am4 can't magically develop more pcie 3 lanes.
Many x370 moboS now have 2x m.2 ports also. One uses 4x pcie 3 lanes for full strength, the other is hald strength using 4 x pcie gen 2 lanes using the shared chipst bandwidth.
what is new, is the 400 chipset will allow slightly better half strength chipset m.2 port using 2 x pcie 3 lanes instead of 4x pcie gen 2 lanes.
Beyond the 4 lanes for the full m.2 and the 4 lanes for the chipset, there still only remains 16 lanes, usually used by the gpu.
For proper nvme raid, you would need to consider 8 lane GPU, which many argue is painless except for some high end games.
Pairing two vanilla nvmeS, one on the gimped chipset & one on the mobo, could still result in far better performance than the best single nvme drives, like the 960 pro.
Paired half strength $120 250GB Evo nvme drives, are much faster than a class champion $340 500GB 960 pro, especially write speed.