There are some mother boards that can use M2 SSD's.
Or SATA to PCI-e..
In terms of speed the bottleneck is the SSD's speed.
But I think could be better a M2 SSD than a SATA one hanging over there.
Is there a penalty in performance using an M2 SSD in a GPU rig?
I'm thinking that maybe in the end they could be sharing the same bus as the GPU's, and this could be bad?
If there's another reason I'm missing why to use SATA SSD's, please tell me!